I used to believe that a song that said "Bye Bye My Baby, Bye Bye" was saying "bye bye my baby ba-ba" My family called bottles ba-bas and when my little sister gave hers away we played that song.
A childhood belief about misheard lyrics

others believed things like this
- I used to think that in the song"Family Affair, they were saying "It's a family of bears!"— Wayne Huffman
- on "highway to hell" i always thought it goes "baby see, baby do" instead of "hey satan, payin´ my dues"— Miss Understood
- That because Gerber Baby Food had a baby on it real babies were put in there. Thanks a lot cousin!— Nicole
- I used to believe that a baby shower was a tiny bathtub with a showerhead just for the baby.— Amy
- i thought I got one year older when my family sang the birthday song.— I am the ghost
- My sister thought that "Ice, Ice Baby" by Vanilla Ice was actually "US Navy".Anon