I was about to comment that she almost could have worn this to the Met Ball, and that's true, but I LOVED that Met Ball dress and would never have wanted to replace it.
This is clearly related to the J Mendel that Anna Kendrick wore to the Oscars, except I wish Anna had worn this one. The bright spot of that dress was the back, and, indeed, the back of this one is kind of great, too:
In fact, I think it sold me on this whole thing -- Heidi braids and windshield bodice pane and oft-unsuccessful color (though I like it on her) and all.
[Photo: Fame/Flynet]