Celebrity See Paris Hilton and Jessica Alba channel Britney Spears with their 'Toxic' Halloween costumes It's Britneys, bitch. By Emlyn Travis Emlyn Travis Emlyn Travis is a news writer at Entertainment Weekly with over five years of experience covering the latest in entertainment. A proud Kingston University alum, Emlyn has written about music, fandom, film, television, and awards for multiple outlets including MTV News, Teen Vogue, Bustle, BuzzFeed, Paper Magazine, Dazed, and NME. She joined EW in August 2022. EW's editorial guidelines Published on October 28, 2023 12:21PM EDT Costumes this good should wear a warning. Paris Hilton and Jessica Alba brought some major Britney Spears energy to the annual Casamigos Halloween party on Friday, donning legendary looks from the singer's "Toxic" music video. And luckily, they didn't both wear the same costume. Hilton, a longtime friend of Spears, arrived at the event sporting the Grammy winner's classic blue stewardess outfit from the video, complete with dangling earrings, a flight pin, and a signature hat. Paris Hilton as Britney Spears' 'Toxic' stewardess at the 2023 Casamigos Halloween Party. Michael Kovac/Getty She also paid tribute to Spears in an Instagram video that featured her miming the pop singer's iconic "It's Britney, bitch" line before strutting down a hallway. "In honor of our Queen," the "Stars Are Blind" singer captioned the clip. "Happy Halloween." The Simple Life star wasn't the only one with Britney on the brain. Alba also took some "Toxic" inspiration for her costume, rocking a glittering nude bodysuit, a blonde wig, and sparkling silver heels — another look Spears pops up in for the video. Kelly Sawyer Patricof and Jessica Alba as Britney Spears. Michael Kovac/Getty Alba's model pal Kelly Sawyer Patricof came dressed as Spears, too, channeling her "...Baby One More Time" music video look. Hilton and Alba were only a few of the stars who showed up to the event. Justin Bieber, Austin Butler, Edward Norton, Kaia Gerber, Machine Gun Kelly, Megan Fox, Glen Powell, Chord Overstreet, and more also attended. Spears reflects on her friendship with Hilton and Lindsay Lohan in her new memoir, The Woman in Me, writing that the trio's highly publicized nights out in the mid-2000s were "never as wild as the press made it out to be." Sign up for Entertainment Weekly's free daily newsletter to get breaking TV news, exclusive first looks, recaps, reviews, interviews with your favorite stars, and more. Related content: Britney Spears says she's 'glad' she didn't land The Notebook role with Ryan Gosling Elle and Dakota Fanning are bringing Paris Hilton's life story to TV with A24 Jensen Ackles says Jessica Alba was 'horrible' to work with on Dark Angel