A song written and performed by John Lennon and featured as the seventh track on his 1974 album Walls and Bridges. In January 1975, it was released as the second single from that album backed by another album track, "What You Got". It continues Lennon's fascination with the number nine (he was born on October 9). On The Beatles' White Album he and Yoko Ono contributed a track titled "Revolution 9". The backing vocal is provided by May Pang, Lennon's mistress at the time.

This clip with some great segments of John and Yoko's home movies amongst other video.