BONUS: The Beatles song most recorded by different artists was never released by the Beatles as a single record. What is the title of that song?

With a melody that famously came to Paul McCartney in a dream, this simple, melancholic ballad holds the Guinness World Record as the most-covered song in modern history. Its universal themes of love and loss have inspired thousands of recorded versions by an incredibly diverse list of musicians, including Frank Sinatra, Elvis Presley, Ray Charles, Marvin Gaye, and Boyz II Men. The song's timeless appeal lies in its acoustic simplicity and heartfelt lyrics, allowing it to be reinterpreted in almost any musical genre.

Appearing on the 1965 album "Help!", the track was a significant departure from the band's established rock-and-roll sound. The recording featured only McCartney on acoustic guitar and vocals, accompanied by a string quartet. Since none of the other Beatles played on it, the band and their producer, George Martin, felt it was essentially a solo performance. They decided against releasing it as an official Beatles single in the United Kingdom, believing it was not representative of the group's collective identity at the time.

Interestingly, the band's American label, Capitol Records, had no such reservations. They released the song as a single in the United States, where it became an enormous number-one hit. Despite its success elsewhere, it never got a single release in the UK until 1976, long after the band had broken up, cementing its unique status as the band's most famous song that they themselves never put in the spotlight.