Swedish country and pop singer Kikki Danielsson scored a 1986-1987 hit with the song "Papaya Coconut" (which she also recorded once again with Dr. Alban in 1998). I used to belive she sang "Pattaya Coconut", refering to Pattaya in Thailand, famous for it's child sex tourism (Actually it's true that the song lyrics refer to holiday travels to warm places).
A childhood belief about misheard lyrics

others believed things like this
- the beatles song 'mean mr mustard' says "shes a real go-getter", i was sure it was "shes a real coconut"...— sally
- I used to believe (when I was 8) that Hitler was description for famous singer, because of "hit"— esesman
- I thought that singer/songwriter was spelled this way: sing-a-song-writer...Anon
- for my little sis -
Paul McCarty song "Band on the Run" but when she sang it it was "Man has the Runs"Anon - I used to think that the actors on tv shows sang the show's theme song.Anon
- i thought I got one year older when my family sang the birthday song.— I am the ghost