When I first heard the song "Eye of the Tiger" from Rocky, when the singer got to the line "Ahye of the Tigah!" (That's what it sounds like to me) I thought they were saying "Oh-Oh-Oh Tyla!".
A childhood belief about misheard lyrics

others believed things like this
- I used to think a tiger was a female and a lion was a male... until I remembered Tony the Tiger.— Alysia
- I thought that singer/songwriter was spelled this way: sing-a-song-writer...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 used to think thunder sounds were called "Boombies" and I would say
"Boombies!" if I heard lightning.— James the Great - i thought the line "saving my face" from the KT Tunstall song of the same name was "shaving my face"Anon
- I used to think that the song"Stayin Alive" said "Staying In Line" like at school when I was little. — MacKenzie