Ringo Starr has penned a tribute to John Lennon's quest for world peace.
The ex-Beatles drummer told The Daily Telegraph he invited Sir Paul McCartney to come and hear the track, which is on his new album, and they ended up collaborating on it.
Ringo said: "Paul came to the house with his bass - that was a good sign, I played him Peace Dream, and he said, 'Sure, I'll play on it,' it had the John Lennon line, so it was natural."
In Peace Dream, Ringo sings: "Can you imagine all of this coming true/It's really up to all of us to do/Just like John Lennon said, in Amsterdam from his bed."
Ringo said: "For me to write that was a normal thing to do. I knew the man. And I really believe that if you, or anyone else, had written it, it would've been weird.
"I was around when he did all that. I also wrote a song for George (Harrison). So it's just part of it for me, they've been my friends for so long."
The 69-year-old musician - who recently put out an internet message to fans saying he would no longer sign autographs - also said he had come to terms with being a Beatle in most people's eyes.
He said: "People only look at me as a Beatle but my friends look at me as a whole person. That's how life works, but it's not bugging me anymore."