John will be the musical guest on David Letterman this Monday, April 27th. John is one of many A-list stars appearing during Dave's final weeks before retiring from the Late Show. His first appearance with Dave was over 30 years ago, they bonded over being fellow Hoosiers, and John has been a regular guest over the years. Don't miss John's last performance on late night TV with Dave! The Late Show with David Letterman airs weeknights (11:35 p.m. ET) on CBS.