Legendary Chicago bluesman Buddy Guy

5 of 15: Buddy Guy, left, and John Mayer perform at the 20th anniversary Farm Aid concert, Sunday, Sept. 18, 2005, at the Tweeter Center, in Tinley Park, Ill. The day-long concert is the culmination of a week of events to benefit family farmers. (AP Photo/Brian Kersey) (AP Photo/ BRIAN KERSEY)

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