"One Summer Dream" is a song written by Jeff Lynne and performed by the rock group Electric Light Orchestra (ELO) which made its first appearance on the band's fifth album, Face the Music, as the last track off the album. It also appeared on the box sets, Afterglow and Flashback. It was released as the B-side of the hit single "Mr. Blue Sky" in 1978. The album version includes an orchestra intro but part of it was cut for the single. "One Summer Dream" (on different singles with "Mr. Blue Sky") has a fading difference for unknown reasons. Backing vocals by Ellie Greenwich.