Years ago, my little sister was heard in her room, singing: "I knew our love was just a passing phrase" to Ant and Dec's Eternal Love.
It's obviously 'phase' not 'phrase', and we're NEVER going to let her live it down! What a corker!
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that true love was eternal.— Pierce
- I always hear Manic Street Preachers 'You Love Us' as 'You Love Arse'.— Lou
- I used to believe that the B-52's song "Love Shack" was actually "Love Shark!"— Natalie
- When Madonna sang "let the choir sing" in "Like a Prayer", I thought she was singing "love by proxy"— Kristen
- I used to think the song "love the one you're with" was called "love the one, your win. — Glowworm
- I am Canadian and when I was little I would sing "True Pastry Love" instead of 'True Patriot Love"— Jess