sentence: personnel per ian macdonald and mark lewisohn : john lennon -- lead vocal , lead guitar , acoustic guitar , percussion paul mccartney -- harmony vocal , bass , drums , piano , maracas release backed with harrison 's '' old brown shoe '' , the single was released in the united kingdom on 30 may 1969 ; lennon and ono were performing a second bed-in at the queen elizabeth hotel in montreal at the time .