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Hollywood is getting into the Halloween spirit. On Friday, Casamigos threw its annual Halloween party, and A-list stars showed up in some unforgettable costumes to celebrate the holiday.<\/span><\/p>\n Megan Fox<\/a> and <\/span>Machine Gun Kelly<\/a> looked to\u00a0<\/span>Kill Bill\u00a0<\/span><\/em>for inspiration, while stars including <\/span>Jessica Alba<\/a> and <\/span>Paris Hilton<\/a> dressed up as <\/span>Britney Spears<\/a>.<\/span><\/p>\n Meanwhile, it was a family affair for <\/span>Kaia Gerber<\/a>, who attended the bash with her beau, <\/span>Austin Butler<\/a>, and posed alongside her parents, <\/span>Rande Gerber<\/a> and <\/span>Cindy Crawford<\/a>, and brother, <\/span>Presley Gerber<\/a>, amid the party.<\/span><\/p>\n Keep reading to see all the A-list stars dressed for the Halloween party.<\/span><\/p>\n Chord Overstreet and Glen Powell as Ricky Bobby and\u00a0Cal Naughton Jr. from\u00a0<\/span>Talladega Nights: The Ballad of Ricky Bobby<\/span><\/em><\/strong><\/p>\n Jenna Dewan and Steve Kazee as Kim and Edward Scissorhands from\u00a0<\/span>Edward Scissorhands<\/span><\/em><\/strong><\/p>\n Justin Bieber as a snorkeler<\/span><\/strong><\/p>\n Kaia Gerber and Austin Butler as Edie Sedgwick and Andy Warhol<\/span><\/strong><\/p>\n Kira Hagaman, Jessica Alba and Kelly Sawyer Patricof as Britney Spears<\/span><\/strong><\/p>\n Megan Fox and Machine Gun Kelly as\u00a0Gogo Yubari and The Bride from\u00a0<\/span>Kill Bill<\/span><\/em><\/strong><\/p>\n Paris Hilton as “Toxic”-era Britney Spears and Carter Reum as a pilot<\/span><\/strong><\/p>\n Rachel Lindsay as Rihanna<\/span><\/strong><\/p>\n Rande Gerber and Cindy Crawford as Danny Zuko and Sandy Olsson from\u00a0<\/span>Grease<\/span><\/em><\/strong><\/p>\n