Linda first met the Beatles at Shea Stadium in 1966. She would later comment, "It was John who interested me at the start. He was my Beatle hero. But when I met him the fascination faded fast, and I found it was Paul I liked."

On "Yesterday", Paul sings:
I'm not half the man I used to be
There's a shadow hanging over me
Oh, yesterday came suddenly

"Say Say Say" was written and performed by Paul McCartney and Michael Jackson. The track was produced by George Martin for Paul's album, Pipes of Peace.

The Fireman is the experimental music duo of Paul McCartney and Youth formed in the early 1990s. Their music catalogue ranges from rock to electronica, evolving over more than two decades and three albums. Although officially anonymous until 2008 with the release of the album Electric Arguments, the identities of the two members had been heavily rumored since their initial album's release in 1993.

Heather Mills was a model, and a collision with a police motorcycle in London resulted in the amputation of her left leg below the knee. She continued to model using a prosthetic limb and sold her story to a tabloid newspaper.

Bob Dylan introduced Paul to marijuana in a New York hotel room in 1964. McCartney recalls getting "very high" and "giggling uncontrollably".

During McCartney's early years with the Beatles, he primarily used a Höfner 500/1 bass, though in 1965, he began sporadically using a Rickenbacker 4001S for recording.

Paul sings this line in "Eleanor Rigby". The hook was suggested by George Harrison during a songwriting session at John Lennon's home at Kenwood.

While Paul would often phone John, he was apprehensive about the reception he would receive. During one call, Lennon told him, "You're all pizza and fairytales!"