Well, now you know what your little black dress should look like this Spring 2009--it was all about sheer, body-con frocks at fashion week this season. Although "sheer" and "bondage" were super trends in their own right, they came together more than once in the form of cocktail dresses. Some were on the looser side, like Christopher Kane's version, and others were explicit in their allusion, like the one from Thakoon. Alexander Wang and Rodarte did the look best, but that's probably because both brands play with the aesthetic on a regular basis. Whichever you prefer remember to put this on your shopping list--bonus points if you find it early and it doubles as your go-to holiday frock.