Paris Hilton and Jessica Alba Dress Up as Britney Spears at Star-Studded Halloween 2023 Party

Paris Hilton and Jessica Alba will intoxicate you with their Halloween costumes.

On Oct. 27, the Paris in Love star and Honest Company co-founder arrived separately at the annual star-studded Casamigos Halloween party with each wearing one of the styles that Britney Spears sports in her iconic 2003 music video "Toxic."

Paris, a longtime friend of the pop star, sported a teal flight attendant costume. She attended the party with her husband Carter Reum, who was dressed up as a pilot. She also posted on Instagram a video of herself walking and modeling her outfit to the tune of the intro to Britney's 2007 music video "Gimme More." Paris lip-syncs, "It's Britney, bitch."

"In honor of our Queen," the heiress captioned her post. "Happy Halloween. #IconsOnly."

Jessica wore a sparkling nude bodysuit to the Casamigos party. The Sin City actress was accompanied by Baby2Baby co-CEO Kelly Sawyer Patricof, who arrived in a schoolgirl costume that Britney wears in her 1998 debut music video "...Baby One More Time."

The party took place three days after the release of the singer's bombshell memoir, The Woman in Me, during which she detailed her life and struggles before and after being placed on a conservatorship that controlled her finances and personal affairs. It was terminated in 2021 after 13 years. In her book, she also spoke favorably about her friendship with Paris.

Britney herself did not attend the Halloween party. Other celebrity guests included Lauren Conrad, Jodi Turner-Smith,  Chrishell Stause and several of her Selling Sunset costars.

See photos of stars celebrating the holiday at the party and elsewhere below:

The Hills alum appears at the annual Casamigos Halloween party.

The Poosh founder recreates her sister Kim Kardashian's iconic Met Gala 2013 maternity style.

The Kardashians star and her son made major moo-ves dressed as cows at a pumpkin-carving bash.

The model vamped it up for a Halloween dinner party.

The "Penthouse" singer went as Barbie from the Barbie movie for The Original Donut Shop's Halloween party Oct. 25.

The couple was magical as Wicked's Elphaba and Glinda.

The Glee star went as a Hufflepuff student from Harry Potter to her son's school dress-up day.

The Last of Us star avoids zombies during a visit to Universal's Halloween Horror Nights.

It's knives out for the star's Halloween Horror Nights trip.

The Vanderpump Rules star and What We Do in the Shadows actor are scared stiff during their Universal Studios outing.

The Oscar winner holds his own amongst a crowd of creepy clowns.

The father-daughter duo rock out at Halloween Horror Night in Hollywood.

The couple enjoys a frightening date night at Universal Studios Hollywood.

The JoBros' youngest sibling has a scary good time at Halloween Horror Nights.

THe star and her son Sebastian get spooked at Halloween Horror Nights at Universal Studios Hollywood.

The Bel-Air star is scared silly at Halloween Horror Nights at Universal Studios Hollywood.

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