Making for one of the more well-attended fetes of the weekend, Kate Hudson's annual bash drew out JLo & Hunter S. Thomson duo Nicole Richie and Joel Madden, a witchy Jessica Alba, David Arquette as Elvis, Gwen Stefani as Cinderella and Jennifer Love Hewitt and her new beau Jarod Einsohn as Brangelina, among many other fellow costume-clad celebs.
The "Glee" gang was out in full force this year, with Lea Michele channeling Natalie Portman's Oscar-winning "Black Swan" character with other castmates spotted on the holiday weekend including Chris Colfer as a Sea-Monkey, Amber Riley as Nicki Minaj and Jenna Ushkowitz teamed up with boyfriend Michael Trevino as Green Monkeys.
As for the Sin City crowd, Heidi Klum hosted a party at Tao dressed as a dead body with Bethenny Frankel opting to go as Hello Kitty. Meanwhile, Nicole “Snooki” Polizzi got catty at PURE while Holly Madison, Scott Disick, Bridget Marquardt, Sam Trammel, and Ice T and Coco were among the other stars working their costumes in Las Vegas.
With Alessandra Ambrosio and Jayde Nicole prettying up the Roosevelt Hotel Halloween Party in Los Angeles, Lindsay Lohan opted to celebrate with friends at the Playboy mansion.
Other highlights over the past few days included Kim Kardashian as poison ivy while hosting a Midori party in NYC, Sofia Vergara dressed as an Angry Bird, Cameron Diaz as a stripper and Adam Lambert portraying a Heavy Metal Lover with boyfriend Sauli Koskinen.