Video: Lupe Fiasco - The Show Goes On (David Letterman Live)

Lupe Fiasco Lupe Fiasco beamed himself to the Ed Sullivan Theatre last night (April 25) to perform a track from his brand new album, Lasers . Backed by a wicked band and his extremely tatted-up background singer, up-and-coming songstress Sarah Green , the rapper gave a rousing performance of the track "The Show Goes On." Watch Lupe wow Letterman below: