 The Beatles became friends with Moon , leading to occasional collaborations . In 1967 , he contributed backing vocals to " All You Need Is Love . " On 15 December 1969 , Moon joined John Lennon 's Plastic Ono Band for a live performance at the Lyceum Theatre in London for a UNICEF charity concert . In 1972 the performance was released as a companion disc to Lennon and Ono 's album , Some Time in New York City . 
