Keri Hilson,Rihanna,and Leona Lewis Perform on PopStars

Rihanna Leona Lewis and Ms.Keri Hilson decided to take the stage (seperate of course) on the popular German Tv show "Popstars".Check that stage out!!

Keri Hilson:I like



Rihanna:"Russian Roulette



Leona Lewis:"Happy"