The Beatles' 1970 split was a bitter one, with emotions running high.
Each of the band members began working on their own solo music shortly after, with varied success. By 1973 - after two middling albums - Ringo Starr started work on his third record (a self-titled venture: Ringo)
However, Starr felt he needed some help with the third album, and wanted to bring in his former Fab Four bandmates. All three Beatles agreed to help Ringo with his new album. John Lennon wrote the track I'm The Greatest for the record.