The "proof" is irrefutable in some fans' minds. One piece of evidence is Lennon's mumbled lyric at the end of "Strawberry Fields Forever." ...

On this day in 1957, John Lennon and Paul McCartney met for the first time, forming a friendship that would eventually lead to The Beatles.

This Beatles song became an anthem for a whole generation, but John Lennon would later admit he didn't really know what he was talking about.

Paul McCartney certainly believes in magic. Behind The Beatles song that opened up McCartney's eyes—and sparked John Lennon's envy.

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Fifty-six years ago today, the Beatles were hard at work on their final album while John Lennon recovered from a car wreck.