"Jack-Ass" is a single by Beck, taken from the album Odelay. The song is based on a sample of "It's All Over Now, Baby Blue", performed by Them (originally by Bob Dylan), from their 1966 album Them Again. The B-side, "Strange Invitation", is a re-recorded version of "Jack-Ass", played on acoustic guitar and strings and anticipates the style Beck would later use on Sea Change in 2002.