Who do you think wins Halloween?

Demi Lovato channeled icon Selena Quintanilla.

Demi Lovato / Snapchat

Ryan Seacrest and Kelly Ripa gave Elisabeth Moss a run for her money with their Handmaid's Tale costumes.

Instagram: @ryanseacrest

Gwyneth Paltrow finally let us see what was in the box.

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Jennifer Garner was adorable as a "Cat Nap."

Instagram: @jennifer

Colton Haynes went as Marge Simpson.

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Jonathan Cheban and Kim Kardashian dressed as Sonny and Cher.

Michael Kovac / Getty Images

Kristen Bell did what she does best and went as Elsa.

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Dua Lipa crushed it as Winona Ryder's angsty Beetlejuice character.

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Lauren Conrad probably tried to kidnap some puppies in her Cruella de Vil costume.

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Joe Keery swapped his spiky baseball bat for a magic wand.

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And Adele glittered it up in green.

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Jenna Dewan Tatum frolicked as a forest fairy.

Instagram: @jennadewan

And, believe it or not, this crooning Night King is actually Jason Derulo.

Michael Bezjian

Amal Clooney and Cindy Crawford looked beyond groovy as '70s divas.

Michael Kovac / Getty Images

Sarah Paulson and Holland Taylor were cute as a panda and Harley Quinn.

Instagram: @mssarahcatharinepaulson

Rita Ora slayed as villainess Poison Ivy.

Instagram: @ritaora

Behati Prinsloo gave an X-ray look at her bun in the oven.

Instagram: @behatiprinsloo

Jaimie King celebrated the Season 2 premiere of Stranger Things as Eleven.

Instagram: @jaime_king

Madelaine Petsch went from Riverdale to Rocky Horror.

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Paris Hilton served a ~lewk~ as Princess Jasmine, while her expecting sister Nicky went as a classy cat.

Kevin Tachman / WireImage

Rachel Lindsay and fiancé Brian Abasolo looked amazing as a Playmate with her Playboy.

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Bruce Willis made us do a double-take as one half of The Shining twins.

Gilbert Carrasquillo / GC Images

Will Poulter rocked an UNCANNY look as Sid from Toy Story, and raised awareness at the same time.

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And Joanna Krupa's Sandy gave me multiplying chills.

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This post will be updated as more celebs share photos of their Halloween celebrations.