Today (June 18 2016) we celebrate the birthday of Paul McCartney, who turns 74 years old. So it wouldn't be right if today's 'Rewind' selection wasn't one of the many classic songs the Liverpool legend has penned over the years. To coincide with his birthday a new compilation was released a few weeks ago on June 10, entitled 'Pure McCartney' and available as a standard CD, 2CD and 4CD boxset. But despite releasing some strong material during his solo years, it will always be his work in The Beatles that Paul will be best remembered for. 'Back in the U.S.S.R.' is the opening track from the double-disc album 'The Beatles', also known as 'The White Album'. Released in 1968, the song is credited to the songwriting partnership Lennon–McCartney, but was in fact written by McCartney. The title is a tribute to Chuck Berry's 'Back in the U.S.A.' while the chorus and background vocals pay homage to the Beach Boys' 'California Girls'.