Hollywood Goes Trick-Or-Treating!

Haylie Duff
Photo: Todd Williamson/WireImage

Hollywood Goes Trick-Or-Treating!

01 of 18

Heidi Klum

Heidi Klum, Halloween
Charley Gallay/Getty

Heidi Klum bared her kitty claws as she arrived at her 8th annual Halloween party-sponsored by Captain Morgan-at Hollywood hot spot the Green Door in Los Angeles.

02 of 18

Roberto Cavalli and Eve

Roberto Cavalli, Eve, Halloween
Mark Von Holden/WireImage

"I wanna know if y'all can shake your tambourine!" said a devilish Eve before launching into her latest song, "Tambourine," at Roberto Cavalli's big bash, held at Cipriani in New York City. Cavalli-who dressed as rival designer Karl Lagerfeld-played the perfect host, stocking the bars with bottles of his eponymous vodka.

03 of 18

Bette Midler and Sheryl Crow

Bette Midler, Sheryl Crow, Halloween
Dimitrios Kambouris/WireImage

Bette Midler and Sheryl Crow made beautiful music together at Midler's 12th annual Hulaween party to benefit the New York Restoration Project. Martha Stewart and Glenn Close also got into the spirit of the evening at the glamorous gathering, held at the Waldorf Astoria hotel.

04 of 18

Ashlee Simpson and Pete Wentz

Ashlee Simpson, Pete Wentz, Halloween
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They didn't don costumes, but Ashlee Simpson and Pete Wentz played the part of the happy couple at Miami's Cameo nightclub, where they joined in the fun at the Belvedere vodka bash.

05 of 18

Britney Spears

Britney Spears, Halloween

A masked Britney Spears made her best attempt to go incognito at Heidi Klum's Halloween bash at L.A.'s Green Door night club, topping off her mix and match costume with a festive sombrero.

06 of 18

Josh Hartnett and Gemma Ward

Josh Hartnett, Gemma Ward, Halloween
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Josh Hartnett used his experience playing Bob Dylan in the flick I'm Not There to channel the folk legend for model Gemma Ward's Imperia vodka Halloween party at the Rose Bar inside New York City's Gramercy Park hotel.

07 of 18

Kate Beckinsale

Kate Beckinsale, Halloween

Kate Beckinsale was one hot devil as she accompanied her daughter on the trick-or-treating rounds in Los Angeles.

08 of 18

Gavin Rossdale, Gwen Stefani and Kingston

Gwen Stefani, Gavin Rossdale, Kingston Halloween

Gwen Stefani and Gavin Rossdale also opted for a G-rated night of trick-or-treating, taking their one and a half year old tot Kingston out house-hopping in Los Angeles.

09 of 18

Jake Gyllenhaal

Jake Gyllenhaal, Halloween

Also on the block in L.A., Jake Gyllenhaal went undercover as a gorilla when he and Reese Witherspoon (not pictured) took Witherspoon's kids door to door to collect sweet treats.

10 of 18

Liv Tyler, Milo Langdon and Royston Langdon

Liv Tyler, Milo Langdon, Royston Langdon, Halloween
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In New York City, Liv Tyler and Royston Langdon went all out with their own costumes to take their superhero son Milo trick-or-treating.

11 of 18

Christina Aguilera and Jordan Bratman

Christina Aguilera, Jordan Bratman, Halloween

Halloween afficionados Christina Aguilera and Jordan Bratman hit up Hollywood club Hyde for a late night fright fest. Aguilera was a sexy spiderwoman, while Bratman played the role of Count Dracula.

12 of 18

Kelly Ripa

Kelly Ripa, Lola Grace, Joaquin Antonio, Halloween
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After several quick changes for the special Halloween episode of Live With Regis and Kelly, Kelly Ripa gave peace a chance as she took children Lola Grace and Joaquin Antonio around their New York City neighborhood.

13 of 18

John Legend and Petra Nemcova

John Legend, Petra Nemcova, Halloween
Larry Busacca/WireImage

A swashbuckling John Legend cozied up to Petra Nemcova (right) at the Roberto Cavalli bash at Cipriani. After an intimate dinner for friends, Cavalli threw open the doors to Halloween revelers and kicked off the evening's entertainment, which included a sultry acrobatics routine and a special performance by Eve.

14 of 18

Paris Hilton

Paris Hilton, Halloween
Chris Weeks/WireImage

Paris Hilton wore barely-there camouflage for the "Very Sexy Halloween" party at DJ AM's LAX nightclub in Las Vegas. Once inside, Hilton stayed in the spirit of Sin City, changing into a sexy inmate costume.

15 of 18

Sean "Diddy" Combs

Sean "Diddy" Combs, Halloween
Andrew Marks/Retna

Though Sean "Diddy" Combs was a masked man at the Cavalli party in New York City-dressing up as the freedom fighter known only as "V" from the flick V for Vendetta-he still couldn't escape the paparazzi that awaited him outside Cipriani.

16 of 18

Jamie-Lynn Sigler

Jamie-Lynn Sigler, Halloween
Sara Jaye Weiss/Startraks

Jamie-Lynn Sigler channeled Factory girl Edie Sedgwick at the annual Imperia Vodka Erotica Halloween ball at Scores West in New York City. Jay-Z and Russell Simmons also stopped by the sexy soiree.

17 of 18

Al, Tiki, Matt, Meredith, Hoda and Natalie

Al, Tiki, Matt, Meredith, Hoda and Natalie, The Today Show, Halloween
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Al Roker, Tiki Barber, Matt Lauer, Meredith Vieira, Hoda Kotb and Natalie Morales dressed as the Munsters for their Today show Monster bash in New York City's Rockefeller Center.

18 of 18

Haylie Duff

Haylie Duff
Todd Williamson/WireImage

Haylie Duff

dressed in accordance with the throwback theme at the Absolut 100 Urban Daddy Halloween Bash at Les Deux in Los Angeles. Danny Masterson DJ'd a 1920's-inspired set for Lauren Conrad, Wilmer Valderamma, Rachel Hunter and Ian Ziering.

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