"Doubleback" is a song performed by the band ZZ Top released in 1990. It was featured on their album Recycler and played during the end credits of Back to the Future Part III. Its music video intercuts ZZ Top playing with scenes from the movie.
During ZZ Top's appearance as the lead three male musicians in the festival band during the Hill Valley festival in 1885, they are playing a country version of "Doubleback". Only this version appears on the soundtrack album.