May 6, 2007, 11:00 GMT
Jessica Biel reportedly has Justin Timberlake's song 'SexyBack' as her mobile phone ringtone.
Jessica Biel - © Glenn Harris / Photorazzi
'The Illusionist' actress recently took her pet pooch to a Los Angeles park and was joking with other dog owners when her phone went off, playing the singer's hit single.
One owner told the National Enquirer magazine: "Everybody loves it when Jessica arrives because she's super friendly and runs around with all the dos - not just hers.
"That day she was joking her puppy gets into everything, when a moment later her cell phone rang and 'Sexy'Back' started playing. The timing was perfect."
Jessica and Justin have frequently been seen together since the pop heartthrob split from Cameron Diaz, and rumours are rife the pair are dating.
Shortly after Justin and Cameron announced their romance was over, he and Jessica were seen flirting at Prince's post-Oscars party and also enjoyed a skiing holiday together - but denied they were dating.
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