LONDON, ENGLAND - APRIL 27: Musicians John Paul White and Gregg Allman perform at A Celebration of Muscle Shoals during the Sundance London Film And Music Festival 2013 at Indigo at O2 Arena on April... more 
LONDON, ENGLAND - APRIL 27: Musicians John Paul White and Gregg Allman perform at A Celebration of Muscle Shoals during the Sundance London Film And Music Festival 2013 at Indigo at O2 Arena on April 27, 2013 in London, England. (Photo by Eamonn M. McCormack/Getty Images for Sundance London) less 
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Getty Images | Photo By Eamonn M. McCormack / Getty Images for Sundance London
Sat, Apr 27, 2013 7:30 PM EDT