Jim, thanks for finding those.

HOWEVER...at the risk of pummeling a defunct equine, that doesn't answer my original question.

I know there was a song called "Choo'n Gum" that was written by Mann Curtis and Vic Mizzy, and was recorded by Dean Martin and Teresa Brewer and the Andrews Sisters, around 1950.   

But the tune to the chorus of this song shows up in Gershwin's "An American in Paris" which was written in 1928. It's clearly intended to represent a popular American tune of the day.

So...does anybody know where Gershwin got that tune?

Aloha,
Mark