personnel paul mccartney -- lead vocal , bass , piano , comb and tissue paper kazoo john lennon -- backing vocal , vocal percussion , acoustic rhythm guitar , comb and tissue paper kazoo george harrison -- backing vocal , slide guitar , acoustic rhythm guitar , comb and tissue paper kazoo ringo starr -- drums shawn phillips - backing vocals george martin -- producer , piano geoff emerick -- engineer other versions fats domino included a cover of this song in his 1968 album fats is back .