Ozzy Osbourne of Black Sabbath performs aLollapalooza on opening day in Chicago's Grant Park on Friday, Aug. 3, 2012. (Photo by Steve C. Mitchell/Invision/AP)

Associated Press
Ozzy Osbourne of Black Sabbath performs aLollapalooza on opening day in Chicago's Grant Park on Friday, Aug. 3, 2012. (Photo by Steve C. Mitchell/Invision/AP)
Ozzy Osbourne of Black Sabbath performs aLollapalooza on opening day in Chicago's Grant Park on Friday, Aug. 3, 2012. (Photo by Steve C. Mitchell/Invision/AP)
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