US singer-songwriter and musician Katy Perry perfoms during the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
US singer-songwriter and musician Katy Perry perfoms during the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
German television presenter Sonja Kraus takes to the catwalk during the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
German model Eva Padberg takes to the catwalk during the presentation of the 'The Blonds' creations at the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
US designer Patricia Field (C) attends the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
Irish singer Roisin Murphy of pop duo Moloko performs during the 'Life Ball 2009' the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
The first winner of Germany's Next Topmodel, Lena Gercke takes to the catwalk during the presentation of the 'The Blonds' creations at the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
US fashion designers David and Phillipe Blond (C) join their models on the catwalk during the 'Life Ball 2009' the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
Irish singer Roisin Murphy of pop duo Moloko performs during the 'Life Ball 2009' the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
US actress Eva Longoria Parker attends the 'Life Ball 2009' the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
General view of the ballroom inside the city hall during the 'Life Ball 2009' in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
US singer-songwriter and musician Katy Perry perfoms during the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
German fashion model Eva Padberg takes to the catwalk during the presentation of the 'The Blonds' creations at the 'Life Ball 2009' in the Vienna Rathausplatz, Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
Austrian actress Sonja Kirchberger (R) and Life Ball Organiser Gery Keszler (L) on the Blue Carpet as guests arrive for the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
Singer Valerie takes to the catwalk during the presentation of the 'The Blonds' creations at the 'Life Ball 2009' in the Vienna Rathausplatz, Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
US actress Eva Longoria Parker (L) and former US president Bill Clinton (C) on the Blue Carpet as they arrive for the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
A visitor is seen during the 'Life Ball 2009' at the Rathausplatz in Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
German actress Sunnyi Melles takes to the catwalk during the presentation of the 'The Blonds' creations at the 'Life Ball 2009' in the Vienna Rathausplatz, Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
Dancing Star Gitta Saxx takes to the catwalk during the presentation of the 'The Blonds' creations at the 'Life Ball 2009' in the Vienna Rathausplatz, Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
Visitors are pictured during the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
Dancers perform on the stage during the opening ceremony of the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
Visitors are pictured during the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/ROLAND SCHLAGER
A visitor is pictured during the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
A visitor is pictured during the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
A visitor is pictured during the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/GEORG HOCHMUTH
Models take to the stage during the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/ROLAND SCHLAGER
Models take to the stage during the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/ROLAND SCHLAGER
Dancers perform on the stage during the opening ceremony of the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
US singer-songwriter and musician Katy Perry (C) perfoms on stage as she attends the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/ROLAND SCHLAGER
Former US President Bill Clinton waves as he attends the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/ROLAND SCHLAGER
US singer-songwriter and musician Katy Perry perfoms on stage as she attends the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
Models take to the stage during the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/ROLAND SCHLAGER
US singer-songwriter and musician Katy Perry (R) and Ex-Eurythmics English Guitarist Dave Stewart perfoms on stage as they attend the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/ROLAND SCHLAGER
US singer-songwriter and musician Katy Perry perfoms on stage as she attends the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
A general view of a spectator in a fountain outside the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HELMUT FOHRINGER
Canadian American actress Pamela Anderson on stage as she attends the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
US film and television actress, comedian, and activist Fran Drescher and former US President Bill Clinton on stage as they attend the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
US singer-songwriter and musician Katy Perry perfoms on stage as she attends the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
German actress Elke Winkens (L) Czechoslovakia born Ivana Trump (C), former Olympic athlete, socialite, and fashion model noted for her marriage to mogul Donald J. Trump, and Life Ball Organiser Gery Keszler (R) on stage as they attend the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HELMUT FOHRINGER EPA/HANS KLAUS TECHT
Canadian American actress Pamela Anderson on stage as she attends the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
US film and television actress, comedian, and activist Fran Drescher and former US President Bill Clinton on stage as they attend the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
Former US President Bill Clinton on stage as he attands the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
German television presenter Katja Burkhardt (C) with unidentified guests on the Blue Carpet as they arrive for the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HELMUT FOHRINGER
German television actress Michaela Schaffrath with unidentified guest on the Blue Carpet as they arrive for the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HELMUT FOHRINGER
Czechoslovakia born Ivana Trump (L), former Olympic athlete, socialite, and fashion model noted for her marriage to mogul Donald J. Trump, and Life Ball-Organisator Gery Keszler (R) on the Blue Carpet as they arrive for the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HELMUT FOHRINGER
A general view of the Blue Carpet area as guests arrive for the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HELMUT FOHRINGER
US television and film actress Eva Longoria Parker on the Blue Carpet as she arrives for the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HELMUT FOHRINGER
US basketball player Tony Parker (L), with wife US television and file actress Eva Longoria Parker on the Blue Carpet as they arrive for the 'Life Ball 2009' at the Vienna Rathausplatz, Vienna, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HELMUT FOHRINGER
Life Ball guests as they arrive for the 'Life Ball 2009' at the Vienna Rathausplatz, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HANS KLAUS TECHT
US model entertainer Amanda Lepore on the Blue Carpet as she arrives for the 'Life Ball 2009' at the Vienna Rathausplatz, Austria, on 16 May 2009. The Life Ball is Europe's largest event for the fight against AIDS/HIV and since its first year in 1993, the Life Ball has evolved to a charity attended by celebrities and politicians every year. EPA/HELMUT FOHRINGER
(L-R) US singer Katy Perry, Pamela Anderson. The 'I Kissed A Girl' singer - who is renowned for her outrageous outfits during her live performances - claims it's easy for her to remain anonymous as nobody expects her to dress down in public. EPA/ROLAND SCHLAGER
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