Rihanna and Cara Delevingne
Rihanna couldn't resist getting in on the action as she attended the Chanel show at Paris Fashion Week.
The 'Fresh off the Runway' singer found her way onto the supermarket-themed catwalk and joked around with her close friend Cara Delevingne.
Rihanna and Cara have become very close in the past year and Cara describes the star as a "down-to-earth girl".
"She doesn’t have that many girlfriends but we have a lot in common," says Cara. "I don’t think many girls understand her".
But they're not the only celebrity friends who can't get enough of each other. Click on for more fabulous famous BFFs..