Halloween is three days away, but that didn't stop a range of celebrities from kicking off the festivities early! Kate Hudson threw her annual costume extravaganza with a major guest list that included Rachel Zoe, Isla Fisher, and Bradley Cooper. We're showing which costumes seem to be the year's most popular, with Paris Hilton — aka Miley Cyrus — leading the charge of celebs who dressed up like other stars! On Allie: Mango top, Alice + Olivia jacket
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