Plastic Ono Band
During the summer of 1970, Lennon and Ono undertook primal therapy under the guidance of Arthur Janov in Los Angeles. This therapy had a great effect on Lennon's writing. In the meantime, the Beatles had publicly broken up, and the pair returned to London at the end of September to begin recording on a pair of studio albums, "John Lennon/Plastic Ono Band" and "Yoko Ono/Plastic Ono Band". The core of the Plastic Ono Band backing the two was Klaus Voorman on bass and Ringo Starr on drums. Phil Spector produced the albums, and he and Billy Preston added keyboards to some select tracks. The "Lennon" album featured straightforward, stripped down rock, while "Ono" featured experimental and Avant-garde music. Both albums were released on 11 December, each to critical acclaim. The single "Mother"/"Why" was released, the songs coming from "John Lennon" and "Yoko Ono" respectively. Subsequently, "Power to the People" was recorded with a lineup of Billy Preston, Bobby Keys, Klaus Voorman, and Alan White. Ono's b-side "Open Your Box" featured Voorman and Jim Gordon. The single was released the following spring, with the sides credited to "John Lennon/Plastic Ono Band" and "Yoko Ono/Plastic Ono Band" respectively.