Mumford & Sons and Emmylou Harris have been confirmed for a new episode of CMT Crossroads . Set to tape this week in the Nashville area before an invitation-only audience, the British band and the Country Music Hall of Fame member will share the stage during the concert scheduled to air Sept. 20. It marks Mumford & Sons’ first appearance on CMT Crossroads. Their new album, Babel, will be released Sept. 24 by Island/Glassnote. Harris previously shared the bill with Dave Matthews for a CMT Crossroads episode that premiered in 2004. Her most recent album, Hard Bargain, was released in 2011.