Sgt. Pepper

Former Beatle says any attempt to visualize the album would clash with fans' own imaginations.

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

Experimental piece from early 1967 can be thought of as a precursor to the White Album's "Revolution 9."

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.