Best displayed by Serena Williams in Galia Lahav Vegas Bridal Collection. The thing is, although I was trying to make a joke about this being a bridal gown, Galia Lahav is best known for their Bridal collections, so I'm not sure how Serena thought she would escape looking like a bride who just escaped her Vegas nuptials!
A better white after-party choice was Kate Beckinsale's Romana Keveza column gown, while it's not a spectacular gown, it looks great on her and she looks lovely, and not like she just escaped the aisle.
Now this speaks to me! Jessica Alba looks cool and comfortable and classy in this flowy 70s-inspired Roberto Cavalli, 3C's that are perfect for the Vanity Fair Oscar Party.