"Xanadu" is the title song from the album Xanadu, the soundtrack to the 1980 film of the same name.
The song is performed by the Electric Light Orchestra and Olivia Newton-John. Newton-John sings the primary vocals, with ELO adding "parenthetic" vocals in the style of their other songs on the "Xanadu" soundtrack, along with providing the instrumentation. A rare collaboration for ELO, the single reached no.1 in several countries and was the band's only UK number 1 single when it peaked there for two weeks in July 1980. The song peaked at number 8 on the Billboard Hot 100 in the US.