Plastic U.F.Ono Band". Around the time of the album's release in November, Lennon moved to Los Angeles with new lover May Pang. In October, Lennon began the recording of an album of rock 'n' roll oldies (a contractual obligation due to a lawsuit). The sessions featured many Plastic Ono Band regulars (including much of the "U.F.Ono Band", Klaus Voormann, and Phil Spector as producer), but when released in 1975 as Rock 'n' Roll, the album was credited to Lennon alone. The sessions for Rock 'n' Roll were extremely troubled and were abandoned until a later date. In July 1974, Lennon returned to New York to record Walls and Bridges. The new "Plastic Ono Nuclear Band" featured Jim Keltner, Kenneth Ascher and Arthur Jenkins continuing from Mind Games, the returns of Klaus Voormann, Nicky Hopkins and Bobby Keys, and the addition of guitarists Jesse Ed Davis and Eddie Mottau. Recording was completed in August, and the album was released in September. Walls and Bridges was the last release of new material by the Plastic Ono Band in the 1970s. Lennon subsequently returned to his marriage with Ono and retired from music following the birth of his son Sean in October 1975. That same month, Lennon issued the compilation Shaved Fish, his last release to be credited to the Plastic Ono Band. Revival (2009–2015) In 2009, Yoko Ono revived the Plastic Ono Band name with the 2009 EP Don't Stop Me!, a preview of the album Between My Head and the Sky. Both albums, and subsequent activities, are credited to the "Yoko Ono Plastic Ono Band". The core members of the new Plastic Ono Band were Sean Lennon (the son of Ono and Lennon), Cornelius (Keigo Oyamada) and Yuka Honda. From 2009, the band performed live concerts, with additional members including bassist Shimmy Hirotaka Shimizu, horn player Michael Leonhart, cellist Erik Friedlander and drummer Yuko Araki. They also performed with many guest performers, including Kim Gordon, Thurston Moore, Bette Midler, Lady Gaga, Mark Ronson, Scissor Sisters, Harper Simon, Paul Simon and Gene Ween. In 2010, at a concert titled "We Are the Plastic Ono Band", Ono and Sean Lennon reunited with Eric Clapton, Klaus Voormann and Jim Keltner. In 2011, Ono and Lennon collaborated with the Flaming Lips on an EP entitled The Flaming Lips with Yoko Ono/Plastic Ono Band. The latest release from the Yoko Ono Plastic Ono Band is the