L.A.'s biggest parties were also the most private. Fergie and Josh Duhamel respectively dressed as Elvira and Riff Raff from The Rocky Horror Picture Show, Johnny Knoxville did his best Liberace impression, and Chelsea Handler got knocked up for Kate Hudson's Halloween shindig at her Pacific Palisades home.
Mike Meldman also hosted a private costume party sponsored by Casamigos Tequila in his Beverly Hills home. Unfortunately, the most talked about look of his event was Julianne Hough's blackface for her Crazy Eyes costume.
Our favorite celebrity costume of the weekend belonged to Cindy Crawford and her husband Rande Gerber, who dressed as Slash and Axl Rose for the Casamigos bash. Anyone who can still look gorgeous in a bad wig and top hat deserves props!