I seem to recall it being on the soundtrack for one of the Batman films. There is a site which has lyrics for songs in films. Can't recall which, but it is mentioned in some threads about Cold Mountain and Oh Brotherhere Art Thou.
Just a warning though - each page on the site tries to offload anything between 15 and 25 cookies onto your computer. I know - I blocked each one individually using Opera in semi-blocking (ask for permission) mode.
Quack!
GtD.