Lennon formed the Plastic Ono Band with Yoko Ono, starting a new chapter in his musical career.

Lennon released his solo debut album, 'John Lennon/Plastic Ono Band,' which included the hit single 'God.'

Lennon moved to New York City with Yoko Ono, where he became increasingly involved in anti-war activism.

Lennon's 18-month separation from Yoko Ono, during which he lived with May Pang and struggled with addiction.

Lennon returned to music with the album 'Double Fantasy,' released just before his death.