Singer-songwriter KT Tunstall joins Simon and Brian to chat about the writing of songs like 'Black Horse and the Cherry Tree', 'Suddenly I See', 'Uummannaq Song', 'Fade Like a Shadow', 'Difficulty', and songs from her recent album, Invisible Empire // Crescent Moon. KT also talks extensively about her approach to looping sounds using pedals, techniques for developing new ideas, and her plans for the future.