Most prom dresses live in relative obscurity. Oh, sure, they have that one night of glory, swishing and showing off on the dance floor. But then back to the closet they go. The exception is dress No.

If you watched the Oscars, it was hard to miss Angelina Jolie's thigh-high slit, Jennifer Lopez's seriously plunging neckline or the dresses with extremely low backs and cutouts in places you normally ...