Britney Spears' Sticky video

Jul 8, 2008, 10:15 GMT

08/17/2002 - Britney Spears - "The Four Feathers" Los Angeles Premiere - Arrivals - Mann Village Theatre - Westwood, CA, USA © Lee Roth / RothStock / PR Photos

Britney Spears is set to record a video segment for Madonna's upcoming tour.

The troubled singer - who famously kissed Madonna at the 2003 MTV Video Music Awards - will be filming a virtual appearance for her idol's 'Sticky and Sweet' concerts.

Madonna's representative Liz Rosenberg confirmed: "Britney is going to film something for Madonna's show in the next week or so. I don't know what they are doing. It's a secret."

However, mother-of-two Britney is unlikely to be making an appearance at any of the 'Give It 2 Me' singer's performances, which start in Wales next month.

This is not the first collaboration between the two stars.

In addition to the controversial MTV performance, Madonna lent her vocal talents to Britney's 2003 single 'Me Against The Music' and also appeared in the raunchy video.

Britney, 26, is attempting to get her career back on track, and is said to be planning her own tour for later this year.

Earlier this year, a source close to the singer said: "Britney will be leaving the US in the next few months, after training in privacy for a month. She is planning a global tour."