Mariah Carey delighted her fans with a Jessica Rabbit-inspired costume. She shared photos of her look on Instagram with the caption, "Happy Halloween! 🎃 #notyet," referencing her annual viral moment ringing in the subsequent holiday season.
Paris Hilton and Jessica Alba were were among the many who wore Britney Spears costumes, with both drawing inspiration from outfits Spears wore in her famous "Toxic" music video. Others also showed off looks inspired by famous styles Spears has worn over the years.
Many stars opted for costumes inspired by characters from classic films like "Happy Gilmore," "Grease" and more.
Jordan Roth in a costume he described as "The Queen of Snow White & the 7 Circles of Hell"
Jordan Roth attends Bette Midler's Annual Hulaween Bash, Oct. 27, 2023, in New York City.
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Paris Hilton as Britney Spears
Paris Hilton attends the Annual Casamigos Halloween Party, Oct. 27, 2023, in Los Angeles.
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Paris Jackson as Old Gregg from "The Mighty Boosh"
Paris Jackson attends the Annual Casamigos Halloween Party on October 27, 2023 in Los Angeles.
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Kelly Ripa and Mark Consuelos in Día de los Muertos (Day of the Dead) looks
Kelly Ripa and Mark Consuelos attend Bette Midler's Annual Hulaween Bash, Oct. 27, 2023, in New York City.
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Glen Powell and Chord Overstreet in "Talladega Nights: The Ballad of Ricky Bobby" costumes and Wells Adams and Sarah Hyland in 'Happy Gilmore' costumes
Glen Powell, Wells Adams, Sarah Hyland and Chord Overstreet attend the Annual Casamigos Halloween Party on Oct. 27, 2023 in Los Angeles.
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Megan Fox and Machine Gun Kelly in "Kill Bill" costumes
Megan Fox and Machine Gun Kelly attend the Annual Casamigos Halloween Party on Oct. 27, 2023 in Los Angeles.
Halsey is seen arriving to Vas Morgan and Michael Braun's Halloween Party, Oct. 28, 2023, in Los Angeles.
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Shaun White and Nina Dobrev as Slash and Axl Rose, and Miles Teller and Keleigh Teller
Shaun White, Nina Dobrev, Miles Teller and Keleigh Sperry are seen arriving to Vas Morgan and Michael Braun's Halloween Party, Oct. 28, 2023, in Los Angeles.
