The Beatles split up in 1970 just after they released their final album, Let It be.
The Fab Four then all went their separate ways and began working on solo music. George Harrison released his seminal album All Things Must Pass in late 1970. And a year later, he began working with John Lennon on the star's second studio album, Imagine.
Lennon ultimately released Imagine on September 9, 1971. It was a smash hit on the charts and reached number one in both the UK and USA album rankings. Imagine has also since been voted 80th in Rolling Stone's list of 500 Greatest Albums of All Time.
