Sgt. Pepper

That's the claim made in a newly discovered interview with former N.W.A manager Jerry Heller.

Recorded during the 'Sgt. Pepper's Lonely Hearts Club Band' sessions, this song is a holy grail of sorts for fans.

At the time, it was one of the most expensive ever created.

Everything from orchestral notes gracing the music to the mocking cover art turned the Beatles on their heads.

Ever willing to experiment with new recording techniques, Paul McCartney tried something different with his bass.