I used to believe "Young Hearts Run Free" was sung by Rod Stewart. It sounded similar to "Do ya Think I'm Sexy?" to me at the time, and now I know the two songs are COMPLETELY different.
A childhood belief about songs

others believed things like this
- I used to think Right Said Fred sung 'I'm too sexy for my lamb' instead of 'I'm too sexy for Milan'.— Nineties music was great
- I always thought Hot Chocolate were singing 'You Sexy PIG' instead of 'You sexy Thing.— Bilz
- When I first heard Matt Monro's song "Born Free," I thought he was singing "Porn Free."Anon
- When i was a tiny lad, I used to think drug free zones were places where you can get drugs for free— Spencer
- My parents used to have an old radio. I thought it could only play old songs, like from when they were young.— kathy
- I used to belive that the word sexy (depending on your sex)
ment you were very girly/boyish.— MysticDarkness