Katy Perry as HRC, Kylie Jenner as Christina Aguilera, and More Celebrity Halloween Costumes Inline

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    Photo: Getty Images
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    Sofia Richie

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    Photo: Splash News
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    Kourtney Kardashian

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    Photo: Splash News
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    Kylie Jenner and Tyga

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    Photo: REX
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    Emily Ratajkowski

  • Martha Hunt
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    Photo: Getty Images
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    Martha Hunt

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    Photo: Getty Images
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    Katy Perry

  • Image may contain Clothing Apparel Sunglasses Accessories Accessory Human Person Evening Dress Fashion and Gown
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    Photo: Courtesy of Samantha Urbani / @samandude
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    Zoë Kravitz

  • Hailee Steinfeld
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    Photo: AKM-GSI
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    Hailee Steinfeld

  • Keke Palmer
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    Photo: AKM-GSI
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    Keke Palmer

  • Maria Sharapova
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    Photo: AKM-GSI
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    Maria Sharapova

  • Nicola Peltz
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    Photo: Splash News
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    Nicola Peltz

  • Demi Lovato and Nick Jonas
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    Photo: AKM-GSI
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    Demi Lovato and Nick Jonas