This topic's worth a separate thread.

My favorite two "mangled lyrics" examples are:
1) In the Beatles "Lucy in the Sky With Diamonds", my mother-in-law thought that the line "the girl with kaleidescope eyes" was "the girl with colitis goes by". Ouch. (A friend told me this same mangled lyric was used in an episode of The Nanny by Fran Drescher)
2) I had a friend in college who hated Huey Lewis's Song "Heart of Rock and Roll" because he thought it was a put-down. Instead of "the heart of rock and roll is still beating", he thought it was "hard rock and roll is defeated". What, the heart-beat after the line didn't give it away?