Luke Bryan, Dierks Bentley Bring ‘Ramblin’ Fever’ to Stephen Colbert [Watch]
Luke Bryan and Dierks Bentley took some time out from getting ready for the ACM Awards to stop by The Late Show With Stephen Colbert for a very special performance. The country stars joined together for a one-of-a-kind cover of the Merle Haggard classic, "Ramblin' Fever."