"What's Up With That" is a 1996 ZZ Top song and single from the album Rhythmeen. The single was a deliberate return to ZZ Top's blues roots, dropping the synthesizers and back to guitar. The harmonica was played by James Harman. The single features two unreleased live recordings that were captured "live and sly" during one of the many ZZ Top late nights. The first live song is a cover song by 1930s blues musician Robert Johnson, that song was only played live during the 1996 . The second song is originally from their 1975 album Fandango!.