Story 
"Love Me Do" is the debut single by the English rock band the Beatles, backed by "P.S. I Love You". When the single was originally released in the United Kingdom on 5 October 1962, it peaked at number 17. [Wikipedia]
McCartney wrote the song aged 16, on the family piano in Forthlin Road, Liverpool. Lennon contributed the harmonica hook (Lennon had bought a chromatic harmonica in Hamburg). It was their debut single. Paul sang lead on the recorded version after George Martin identified a harmonic conflict between John's vocal and harmonica parts. McCartney later recalled the uncomfortable spontaneity of this arrangement: "I was suddenly given this… suddenly pushed into it" (Lewisohn 1988, p.6). The song's blues roots were acknowledged by McCartney in interview: 'Love Me Do was us trying to do the blues. It came out whiter because it always does' (Lewisohn 1988, p.7).
Recorded three times in 1962: at the 6 June artist test with Pete Best on drums (that tape was destroyed once it was clear nothing from the test would be issued — Lewisohn p.17), on 4 September with Ringo Starr at his first Beatles session, and again on 11 September, when Ron Richards — producing in George Martin's absence — brought in session drummer Andy White and moved Ringo to tambourine. The mapping of versions to releases is the reverse of what many assume: the 4 September Ringo version was on the original UK single (Parlophone 45-R 4949), while the 11 September Andy White version — the one with the tambourine — went on the Please Please Me LP and, from 1963, on all single pressings (Lewisohn p.22). Eighteen takes of the re-make were recorded before one proved satisfactory (Lewisohn p.20). For the full mix-and-master lineage, see the dedicated section below.