"Xanadu" is the title song from the soundtrack to the 1980 film Xanadu. The song is performed by English-born Australian singer Olivia Newton-John and English rock band Electric Light Orchestra (ELO). Newton-John sings the primary vocals, with ELO lead singer and the song's writer Jeff Lynne adding parenthetic vocals in the style of their other songs on the Xanadu soundtrack, along with ELO providing the instrumentation. It is Lynne's favourite song of all that he has written.
"Xanadu" reached number one in several countries and was the band's only UK number-one single, when it peaked there for two weeks in July 1980. It was certified Silver by the British Phonographic Industry. It also peaked at number eight on the US Billboard Hot 100.
The music video also appears in the Friends episode "The One With Rachel's Date"