Rihanna performs during the Rock in Rio music festival in Rio de Janeiro, Brazil, early Saturday Sept. 24, 2011. The festival, which runs through Oct. 2, includes Katy Perry, Rihanna, Stevie Wonder, ... more 
Rihanna performs during the Rock in Rio music festival in Rio de Janeiro, Brazil, early Saturday Sept. 24, 2011. The festival, which runs through Oct. 2, includes Katy Perry, Rihanna, Stevie Wonder, Red Hot Chili Peppers, Metallica, Guns N' Roses and Coldplay. (AP Photo/Felipe Dana) less 
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Associated Press | Photo By Felipe Dana
Sat, Sep 24, 2011 2:14 AM EDT