LOS ANGELES, CA - FEBRUARY 10: (L-R) Musicians Zac Brown of the Zac Brown Band, T-Bone Burnett, and Mavis Staples perform onstage at the 55th Annual GRAMMY Awards at Staples Center on February 10, ... more 
LOS ANGELES, CA - FEBRUARY 10: (L-R) Musicians Zac Brown of the Zac Brown Band, T-Bone Burnett, and Mavis Staples perform onstage at the 55th Annual GRAMMY Awards at Staples Center on February 10, 2013 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images) less 
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Getty Images | Photo By Kevork Djansezian / Getty Images
Mon, Feb 11, 2013 12:37 AM EST