Skinny cow set up a pink carpet (here I was entering - very late from work and LA traffic):
See the dancers on the stage for the credits?
The dress was simple, with a side zip. The lace covers the seaming from bodice to skirt with a triangle in the back. The front had side and front darts. It seemingly was made of a lightish cotton blend. I wish I took a picture from the back! Darn it! I do think would be relatively simple to reproduce. The costumes from the movie are fantastic - I do wish they had more of them to display.
Some pictures from the actual movie showing the movement of the dress: