We all know that the 100th episode of Gossip Girl (season 5) will feature Blair Waldorf's wedding to the Prince and of course Serena's dress can not be some off the rack design but instead a show stopper. The dress Serena wore is actually meant to be a wedding dress which is designed by Vera Wang and I think it is stunning.
In my opinion this Vera Wang dress is much better then the Ralph Lauren bridesmaid dress she wore to her mother's wedding in season 1.
Even Dan looks better at Blair's wedding (season 5) than what he looked like at Lily's wedding in season 1.