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This was a parody song created by Tony Hendra. While it's not actually John Lennon singing (some people thought it was) they are all his words taken form his rolling stones interview from 1971.
WARNING foul language, but very funny:
http://www.youtube.com/watch?v=7qrMEEN6WxM

Also the rolling stones interview is here, give it a look he actually comes across as sane, funny and fair in the interview.
http://taz4158.tripod.com/johnint.html