Today may finally, officially be Halloween, but, save for the trick-or-treaters hitting your block, just about everyone who's anyone in New York celebrated the spooky occasion during an extended party-filled weekend. And if you thought the A-list social set goes all-out for a black-tie affair, just wait until you see the elaborate looks the city's chicest pulled over the past few days. If your VIP invites got lost in the mail, click through for a peek inside the hottest Halloween bashes you missed.

[Luca Mornet, Ivy Getty, Julian Polak by Lanscine Janneh/]