Merle Haggard, center, performs with Vince Gill, left, and Keith Urban, right, during the All for the Hall concert on Tuesday, April 10, 2012, in Nashville, Tenn. The concert is a benefit for the ... more 
Merle Haggard, center, performs with Vince Gill, left, and Keith Urban, right, during the All for the Hall concert on Tuesday, April 10, 2012, in Nashville, Tenn. The concert is a benefit for the Country Music Hall of Fame and Museum. (AP Photo/Mark Humphrey) less 
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Associated Press | Photo By Mark Humphrey
Wed, Apr 11, 2012 12:45 AM EDT