Who Was the Best-Dressed on Halloween?

Lots of celebrities got all done up for Halloween, but a few great costumes really stood out. Heidi and Seal had crazy costumes for their bash in NYC, while Christian Aguilera and Kate Beckinsale made their holidays family affairs. Brad Pitt coordinated with Zahara to go trick-or-treating, and Jennifer Garner did the same with her daughter Violet. It's a tough decision, but tell us — who do you think had the best costume?

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