WU LYF perform 'Heavy Pop' live on Letterman last night. Their debut album Go Tell Fire to the Mountain continues to blow me away with each listen. Seeing them play Letterman and lighting it up live gets me very excited for the time they hit the US for a full fledged tour. Watch the video right until the end and you see them awkwardly trying to leave the set as Dave is thanking them and saying goodbye. No biggie though.