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Santigold performs at the "Made In America" music festival on Sept. 2, 2012, in Philadelphia.
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Jay-Z performs at the "Made In America" music festival on Sept. 1, 2012, in Philadelphia.
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Jill Scott performs at the "Made In America" music festival on Sept. 2, 2012, in Philadelphia.
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Rita Ora performs at the "Made In America" music festival on Sept. 2, 2012, in Philadelphia.
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The lead singer of The Hives, Pelle Almqvist, performs at the "Made In America" music festival on Sept. 2, 2012, in Philadelphia.
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Miike Snow performs at the "Made In America" music festival on Sept. 1, 2012, in Philadelphia.
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D'Angelo performs at the "Made In America" music festival on Sept. 1, 2012, in Philadelphia.
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Drake performs at the "Made In America" music festival on Sept. 2, 2012, in Philadelphia.
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The "Made In America" music festival is seen in front of the Philadelphia Museum of Art on Sept. 1, 2012, in Philadelphia.
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Run DMC performing at the "Made In America" music festival on Sept. 2, 2012, in Philadelphia.
AP Photo/Matt Rourke
Concert-goers shield themselves from a midday rainstorm as they go through security for the "Made In America" music festival, on the Benjamin Franklin Parkway, Sept. 2, 2012, in Philadelphia.
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People attend the "Made In America" music festival in Philadelphia on Sept. 2, 2012.
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Pearl Jam performs at the "Made In America" music festival on Sept. 2, 2012, in Philadelphia.