John Prine, Sturgill Simpson, and Brandi Carlile perform “Summer’s End” on Colbert: Watch

Today, country folk legend John Prine celebrates the release of The Tree of Forgiveness, his first album of original songs in over 13 years. On Thursday, to mark the occasion, Prine served as the musical guest on the Late Show with Stephen Colbert

Click HERE to watch John Prine, Sturgill Simpson, and Brandi Carlile's performances performance