My sister in law once said to me that she thought that the Barry Manilow song 'Copacabana' was about a dog, because she misheard the lyrics 'and when she'd finished he called her rover' which are actually 'And when she finished, he called her over' well it does sound the same if you say it fast I suppose.
A childhood belief about misheard lyrics

others believed things like this
- I used to think that the title of Barry Manilow's song "Looks Like We Made It" was "Looks Like Tomatoes".— close2nd
- I used to think that when a song finished on the radio it would play again on the next station— Maria
- I used to believe that TV finished after Blue Peter.— Jen
- I used to believe that you got married right after you finished high school or college. Anon
- I use to believe the sound that a car made when it was running low on gas was what they called horse power...— Bianca
- i used to believe the sound from a piano came from the keys hitting a stuff called "sploosh"{wierd, huh?}.— exploding buttox