1Kim Kardashian, 2008
Getty ImagesAnyone else getting serious Catherine Zeta-Jones-in-Chicago vibes?
2Khloé Kardashian, 2008
GettySo many cop puns, so little time. Let's just appreciate Khloé's attention to detail here. (Yep, her name tag reads "Officer Naughty.")
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3Kim Kardashian, 2008
Getty ImagesEver the trendsetter, Kim was lightyears ahead of the Wonder Woman craze.
4Kim Kardashian, 2010
Getty ImagesNot sure when Little Red Riding Hood became a sexy costume, but here it is.
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5Kim Kardashian, 2010
InstagramIf you don't dress up as a sexy cat at least once, are you even doing Halloween right?
6Kourtney Kardashian, 2010
kourtneykardashian.comAhoy! Kourt channeled this sexy pirate ~lewk~ on a typical fall day in LA (ie. it was probably super warm).
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7Kim Kardashian, 2011
Getty ImagesThis costume was so convincing, it actually made me wonder if Kim moonlights as Poison Ivy.
8Kim Kardashian, 2012
Getty ImagesLike a sexy mermaid version of the Starbucks siren!
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9Kourtney Kardashian, 2012
Getty ImagesKourtney as Batgirl: the hero Calabasas deserves.
10Kim Kardashian, 2012
Getty ImagesKim's Catwoman costume puts the ow, ow in meow.
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11Kylie Jenner, 2014
InstagramKylie channeled her inner Bride of Chucky to match then-boyfriend Tyga's Chucky. It was a scary display for sure.
12Kourtney Kardashian, 2016
Getty ImagesCalling it now: "Zombie bride" will be the next big look for wedding season.
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13Kendall Jenner, 2016
InstagramOK, but can Kendall make vampy goth her signature style every day?
14Kylie Jenner, 2016
InstagramThe resemblance to Christina Aguilera is so spooky, it's no wonder Kylie chose this as her costume.
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15Khloé Kardashian, 2016
InstagramNothing says dark, mysterious, *and* sexy like a black latex jumpsuit, amirite?
16Kim Kardashian, 2017
GettyKim and BFF Jonathan dressed up as her style icon Cher and Sonny from the duo's memorable 1973 Academy Awards look. If I could turn back time, I would tell the guy who's dressed up like Aladdin in the back to smile for this otherwise perfect photo.
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17Kim Kardashian, 2017
Snapchat 18Kendall Jenner, 2017
Snapchat/Justine SkyeKendall’s Halloween was extra special in 2017 for several reasons: (1) she celebrated her 22nd birthday early with a costume party; (2) she dressed up as Buttercup from The Powerpuff Girls; (3) all her BFFs were in attendance, including Hailey Baldwin and Justine Skye.
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