jazz fusion artist and author perform during the event during festival .
{"Image ImageDescription": "CHICAGO, IL - MARCH 31: Nicholas Payton and Gary Thomas perform during the Bitches Brew 40th Anniversary Band event during the 2011 Miles Davis Festival at Martyr's on March 31, 2011 in Chicago, Illinois. (Photo by Daniel Boczarski/Getty Images)", "Image Copyright": "2011 Getty Images"}