name that (dress) tune

Reader Rebecca has written in to ask for help identifying a song about a dress (she found me through this post, I bet).

She says:

I heard the song on the Thistle and Shamrock NPR show years ago. The story of the song seemed to be a girl asking her mother what dress she should wear, and the mother offering various reasons why she shouldn't. I believe in the last verse they come back to the dress from the first verse, and realizing that there's nothing else to wear, the girl and mother finally agree.

She's already googled the heck out of it ... anyone know it out of their actual heads?

(The image is just a random piece of sheet music from eBay ... not the song being hunted.)