Hollywood’s hottest stars, including Paris Hilton, Justin Bieber, Jessica Alba, and more, turned heads at Cindy Crawford and Rande Gerber’s annual Casamigos Halloween party, showcasing their elaborate and creative costumes.

In a star-studded event organized by the tequila brand Casamigos, co-founded by Rande Gerber and George Clooney, celebrities came dressed to impress for the spooky occasion. Paris Hilton paid homage to Britney Spears by donning a sexy stewardess dress and matching hat from the pop star’s “Toxic” music video. Jessica Alba joined the Spears fan club, wearing a barely-there, sheer, sparkly jumpsuit from her own 2003 hit movie, “Honey,” complete with a blonde wig and sparkling rhinestones.

Justin Bieber made a splash at the Halloween bash dressed up in snorkeling gear, with his shirt open to reveal his tattooed body. Victoria’s Secret model Alessandra Ambrosio flaunted her fit physique as a sexy gold goddess, stunning in a two-piece sequined set with sparkling fringes and a partial tulle skirt, topped off with a gold floral headband.

The hosts of the evening, Cindy Crawford and Rande Gerber, embraced the Halloween spirit by dressing up as Sandy and Danny from the classic movie “Grease,” channeling their inner John Travolta and late Olivia Newton-John. Their daughter, Kaia Gerber, joined in on the family moment by dressing as the 1960s model Edie Sedgwick. Kaia attended the Halloween bash with her boyfriend, Austin Butler, who dressed as the famous artist Andy Warhol.

Megan Fox and Machine Gun Kelly made a killer entrance with their Halloween costumes inspired by Quentin Tarantino’s “Kill Bill: Volume 1” movie. Fox sported a costume resembling the schoolgirl assassin Gogo Yubari, while Kelly coordinated his outfit with Uma Thurman’s iconic yellow jumpsuit from the film. The couple added fake blood to their faces for an extra spooky touch.

Overall, Hollywood’s biggest stars showcased their creativity and style at the Casamigos Halloween party, making it a night to remember.