I used to believe that the ABBA song Waterloo was about the train line in London, before realising, due to the lyrics, that I was actually about the historical battle!
A childhood belief about misheard lyrics

others believed things like this
- Abba - Waterloo
"Portaloo
Finally facing my Portaloo..."— Santa Puncher - in the song with the lyrics "take your passion" my sister used to always think it was "take your pants off"— Steped
- I spent ages wondering what a bart ender was as a child without realising that it was actually bar tender.— Heather
- When I was a kid, I thought the musical Mamma Mia did songs from the A*Teens (the teenage version of Abba)Anon
- My mum always thought the lyrics to macy grays song was i try to say goodbye to my chook.— alana
- I used to think that the song"Stayin Alive" said "Staying In Line" like at school when I was little. — MacKenzie