Merle Haggard views an exhibit on the Bakersfield sound at the Country Music Hall of Fame and Museum in Nashville, Tenn. on April 10, 2012 (AP Photo/Mark Humphrey)
Merle Haggard is interviewed backstage at 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/Wade Payne)
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)
