U.S. Derrick Green of Brazilian heavy metal band Sepultura performs during Rock in Rio music festival in Rio de Janeiro, Brazil, Sunday Sept. 25, 2011. The festival, which runs through Oct. 2, includes performances by Katy Perry, Rihanna, Stevie Wonder, Red Hot Chili Peppers, Metallica, Guns N' Roses and Coldplay. (AP Photo/Felipe Dana)