The song was originally recorded to be included on the aborted album “Get Back”.
“Get Back” becomes The Beatles 16th UK No.1 in 1969
Originally released as a single on 11 April 1969 and credited to “The Beatles with Billy Preston, “Get Back” was the first and only single by The Beatles to credit another artist, Preston played the organ on the song and was by then one of the few people that were privileged to be called a “5th Beatle”. The song was initially thought to be included on their aborted 1969 album “Get Back” that would become “Let It Be” in 1970. The Beatles performed “Get Back” (along with other songs from the album) as part of the Beatles’ rooftop performance, which took place on the roof of Apple Studios in Savile Row, London on 30 January 1969, an edited version of which was included in the “Let It Be” film. During the famous rooftop appearance, “Get Back” was performed in full three times. Due to the increasing popularity of the Stereo formats over Mono, “Get Back” also became the first single release in true stereo in the US by the band. On April 23, 1969, “Get Back” was No.1 at the UK Singles charts, their 16th single to achieve the top position in their home country.