I heard the song "Camp Grenada" by Allan Sherman (the one that goes "Hello Muddah, Hello Faddah, here I am at Camp Grenada"..) long before I ever heard the classic music it's based on: "Dance of the Hours". When I finally saw "Fantasia" I wondered what Hippos and Crocodiles had to do with camping!
A childhood belief about songs

others believed things like this
- When I was a kid I heard that the Beatles did acid and I wondered if they melted from it.Anon
- When I first heard Bruce Springsteen's song, "Born in the USA," I thought that the song was "Porn in the USA"Anon
- I thought that hippos were baby elephants— Gerna
- whenever i heard a melody, i thought it stuck in my stomach when i heard it in my mindAnon
- In a religious song, instead of “Jesus Christ” I heard “Cheese is Prize”— EJ
- When I first heard the song "Constant Craving" by KD Lang, I thought she was singing "God save gravy."Anon