Musician Dave Grohl and the Foo Fighters perform at the Global Citizen Festival in Central Park on Saturday Sept. 29, 2012 in New York. (Photo by Evan Agostini/Invision/AP)

Associated Press
Musician Dave Grohl and the Foo Fighters perform at the Global Citizen Festival in Central Park on Saturday Sept. 29, 2012 in New York. (Photo by Evan Agostini/Invision/AP)
Musician Dave Grohl and the Foo Fighters perform at the Global Citizen Festival in Central Park on Saturday Sept. 29, 2012 in New York. (Photo by Evan Agostini/Invision/AP)
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