It started with Paul McCartney officially leaving the group but the guys had not played together for about a year. In other words, The Beatles had not really been a group since they recorded "Abbey Road" in the spring and summer of 1969.
2 months after the official breakup, McCartney released a solo album. It was so "solo" that he played every instrument. The most popular song was "Maybe I'm amazed" although it was never released as a 45 in the US.
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