From celeb-inspired looks to spooky getups, see the costumes PEOPLE.com readers shared with us on Twitter!
Credit: Courtesy Whitney
Updated: Thursday Oct 29, 2009 | 06:00 AM EDT
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"Last year, I was S and my best friend was B. xoxo!" writes ohsowhitty about her Gossip Girl-inspired costume of the Upper East Side's reigning queens of mean, Blair and Serena.
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