and John Lennon
collaborated on many albums, beginning in 1968 when Lennon was still a Beatle, with Unfinished Music No.1: Two Virgins, an album of experimental and difficult electronic music. Two less controversial, yet equally challenging and experimental albums were released in addition to Two Virgins; Unfinished Music No.2: Life with the Lions, and Wedding Album, both in 1969. Several of their later albums were released under the name The Plastic Ono Band
, and often featured other musicians such as Eric Clapton, Klaus Voorman, and Alan White.