Blog Duke Spirit to play on Letterman tomorrow! December 7, 2008March 1, 2017 admin Attention Duke Spirit addicts! Feed your addiction tonight and tune in to David Letterman. The Duke Spirit is going to be playing a set in-studio. Get ready to hear that crazy, moon-shaped tambourine rattle, and get ready to rock. Ever since they appeared on the scene, The Duke Spirit has been attracting notice. They’ve got a charismatic Liela Moss as frontwoman, slashing riffs and are heavily influenced by classic rock and the blues. What’s not to love?