Keith Urban's Fifth Annual "We're All 4 The Hall" Benefit Concert [Getty Images]

NASHVILLE, TN - MAY 06: (EXCLUSIVE COVERAGE) Keith Urban, Carrie Underwood, and Brantley Gilbert attend Keith Urban's Fifth Annual "We're All 4 The Hall" Benefit Concert at the Bridgestone Arena on May 6, 2014 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images for the Country Music Hall of Fame and Museum)

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