Georgiansilver said

"There she was just a walking down the street,
Singing "Doo wah diddy diddy dum diddy doo"

Have you ever heard anyone walking down the street singing those words.... even after the song came out???? "

I agree.

It's a great big mystery (and it sure is worrying me). I wish somebody would tell me what "Doo wah diddy diddy dum diddy doo" means...