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May 18, 2013

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LL Cool J, left, and Tom Morello perform on stage at the 55th annual Grammy Awards on Sunday, Feb. 10, 2013, in Los Angeles.

John Shearer/Invision / AP

LL Cool J, left, and Tom Morello perform on stage at the 55th annual Grammy Awards on Sunday, Feb. 10, 2013, in Los Angeles.