Below, learn more about the first time Paul McCartney took the hallucinogen and how it affected his relationship with John Lennon.

In the years after The Beatles split up, both John Lennon and Sir Paul McCartney released solo music - but it's safe to say they were not fans of each other's work at first ...

After The Beatles parted ways and released their own music, Paul McCartney said he only liked one song by his former bandmate ...

Paul McCartney and John Lennon's relationship worsened even after The Beatles split in 1970, but one hurtful incident ...

Paul McCartney said he was put down by a startling 'revisionism' of The Beatles' legacy that happened shortly after bandmate and best friend John Lennon died in 1980 ...

Despite having a catalog loved by the world, Paul McCartney didn't see much to like in this Beatles member's discography, ...

After the breakup of The Beatles, Paul McCartney released his song 'Too Many People' that shaded John Lennon and Yoko Ono, but it was originally more scathing ...

Paul McCartney and Yoko Ono's relationship was notoriously strained even before The Beatles split up, but it was what she ...

The Beatles' final months were perfectly explained in Peter Jackson's three-part documentary, The Beatles: Get Back, but Paul McCartney once gave his brutal opinions about the time ...

Paul McCartney wishes ‘very happy’ 85th birthday to Ringo Starr - The Beatles drummer hosts an annual ‘peace and love’ moment ...

It's the first time that Sean Ono Lennon, James McCartney and Zak Starkey have collaborated on original music.

Two years later, the Lennon/McCartney partnership is together again – but with a twist. Their sons Sean Ono Lennon and James McCartney have joined forces with Zak Starkey (son of Ringo Starr) on a new ...