I'm trying to figure out who did this song. I can't remember much of the lyrics but my mom used to sing it to me when i was a little guy. This was about 35-40 years ago, so the song would be pretty old. It had something like knock, knock, knock in the chorus please let me in, it was sorta like a 50's type song something like the four tops or the platters would sing but i think it was from the 60's. It was a finger snapping kind of song. It wasn't knock 3 times on the ceiling, it wasn't knockin on heavens door, wasn't the little blue man. It was a cute kind of song maybe from a one hit wonder. I heard it on an oldies station a few years ago & haven't heard it since. I know this isn't much to work with, but anybody got any ideas?? Any input would be appreciated! Thanks, Rob