i was at a Barenaked Ladies concert, (it's not what you think, they're all guys and the name is just a joke)with my dad. we were sitting parallel to the band and rather far away. In one of their songs, "Helicopters" i believe, the repeatedly sing the lyrics "I'll be leaving soon, yeah I'll be leaving soon" my dad thought it was "I believe in silk" when we got home my mom asked how the concert was and my dad just said: "It was really good. BEtter than i thought it would be. But what the heck is "I believe in silk?"
A childhood belief about misheard lyrics

others believed things like this
- I thought the lyrics to "Single Ladies" were "If you liked it, then you should've put your name on it."Anon
- I thought that on the show "American Chopper" they built helicopters.— Alex319
- I used to believe that when a song came on the car radio, the band was sitting on top of our van.Anon
- I used to think that church songs were pop music. Well, we did sing them in church every week...— Roxy
- I used to believe that the little 'helicopters' that fall from the trees were dead tadpoles.— Chester Finnigan SnapDragon McFisticuff
- I used to believe Sting was my dad in a parallel universe — Jenn Green