When I was 4 I thought Paul Simon's Fifty Ways to Leave our Lover was:
Hop on the Back Jack
Make a New Plan Sam
You Don't Need to Wear Corduroys
Just Listen to Me
(real lyric - Coy to Roy)
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that Paul Simon was my cousin. He isn't.Anon
- I told someone once that my favorite band was the Funkel brothers- Simon and Garth.
(Simon & Garfunkel)— Josie - i used to think that if i tore a dollar bill in half it would make fifty cents— stacy
- I used to belive that Jack Frost was a real man! and that he came and painted frost on the windows at night.— Tom
- My daughter thought Paul McCartney was singing "Hey Dude" instead of "Hey Jude". Anon
- I thought Jack was a nickname for Jackery ( like Zack and Zachary).— Bootlebat