When I was maybe 8...I was addicted to watching CSI with my parents. The lyrics to the opening song are; 'Whooooo are you!? Who, who, who, who!?' However, I was convinced that that they were; 'Gooood morning! Good, good, good, good!' When I sang along to my version....my parents laughed so much :)
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that aliens would come and take me if I wasn't good to my parents— somebody
- When I was little I used to believe everything the government does is right and for the good of everyone.— Rob
- I used to think that my cat was an alien that had come to teach me how to be good!— laz
- when I was a little boy I thought i would become zidane but i was not as good as him— elbouteman10
- i used to believe that if i was good at school, i had a chance of becoming the queen????— donia
- i used to think that everyone else in the world were robots, put here to make sure i was good— andy