John Lennon & Plastic Ono Band

The Plastic Ono Band is a conceptual supergroup formed by John Lennon and Yoko Ono in 1969 before the dissolution of the Beatles. Among the various other members of the band were Eric Clapton, two more Beatles (George Harrison and Ringo Starr), artist Klaus Voorman, future Yes drummer Alan White, members of Delaney and Bonnie, The Who's drummer Keith Moon, New York band Elephant's Memory, Billy Preston, Nicky Hopkins, Phil Spector, drummer Jim Keltner, and, in a 2009 revival, Sean Lennon.

Details: http://en.wikipedia.org/wiki/John_Lennon_%26_Plastic_Ono_band