 When issued as a single in May 1970, a month after the Beatles' break-up, it became the group's 20th and last number-one hit on the "Billboard" Hot 100 chart in the United States.The main recording of the song took place in January 1969 and featured a sparse musical arrangement.When preparing the tapes from these sessions for release in April 1970, producer Phil Spector added orchestral and choral overdubs.