Halloween in Hollywood 2011

Neil Patrick Harris, right, and partner David Burtka pose with their 1-year-old twins, son Gideon and daughter Harper, in Halloween costumes in a photo posted on Harris' Twitter account on Nov. 1, 2011.

Model and television personality Heidi Klum, left, and husband Seal attend Klum's annual Halloween party at the Dream Hotel on Monday, Oct. 31, 2011, in New York.

Pictures: Stars' Halloween costumes 2012

Heidi Klum and husband Seal attend Klum's 12th annual Halloween party on Oct. 31, 2011, in New York.

Singer Fergie attends Heidi Klum's annual Halloween party at the Dream Hotel on Monday, Oct. 31, 2011 in New York.

Pictures: Stars' Halloween costumes 2012

Actress Michelle Trachtenberg attends Heidi Klum's annual Halloween party at the Dream Hotel on Monday, Oct. 31, 2011, in New York.

Models Tyson Bedford and Shanina Shaik attend Heidi Klum's 12th annual Halloween party on Oct. 31, 2011, in New York.

Pictures: Stars' Halloween costumes 2012

Designer Austin Scarlett attends Heidi Klum's 12th annual Halloween party on Oct. 31, 2011, in New York.

Model Kate Upton attends Heidi Klum's annual Halloween party at the Dream Hotel on Monday, Oct. 31, 2011 in New York.

Pictures: Stars' Halloween costumes 2012

Singer Natasha Bedingfield attends Heidi Klum's annual Halloween party at the Dream Hotel on Monday, Oct. 31, 2011 in New York.

Model Doutzen Kroes attends Heidi Klum's annual Halloween party at the Dream Hotel on Monday, Oct. 31, 2011, in New York.

Pictures: Stars' Halloween costumes 2012

Model Jessica White attends Heidi Klum's annual Halloween party at the Dream Hotel on Monday, Oct. 31, 2011 in New York.

Pictures: Stars' Halloween costumes 2012

Models Christine Teigen, left, and Kate Upton attend Heidi Klum's annual Halloween party at the Dream Hotel on Monday, Oct. 31, 2011, in New York.

Model Nicole Trunfino attends Heidi Klum's 12th annual Halloween party on Oct. 31, 2011, in New York.

"Jersey Shore" star Vinny Guadagnino attends Heidi Klum's 12th annual Halloween party on Oct. 31, 2011, in New York.

Pictures: Stars' Halloween costumes 2012

Model Amber Rose attends Heidi Klum's 12th annual Halloween party on Oct. 31, 2011, in New York.

Pictures: Stars' Halloween costumes 2012

Model Miranda Kerr attends her Halloween party at Catch Roof on Oct. 31, 2011, in New York.

Mike "The Situation" Sorrentino attends Miranda Kerr's Halloween party at Catch Roof on Oct. 31, 2011, in New York.

Russell Simmons, left, and Andrew Harrell attend Miranda Kerr's Halloween party at Catch Roof on Oct. 31, 2011, in New York.

Pictures: Stars' Halloween costumes 2012

Kim Kardashian, dressed up as Poison Ivy, attends the Midori Green Halloween costume party on Oct. 29, 2011, in New York.

Heidi Klum attends her 12th Annual Halloween party on Oct. 29, 2011, in Las Vegas.

TV personality Holly Madison wears a sexy Rapunzel costume at her 3rd Annual Hollyween, held at Studio 54 at the MGM Grand Hotel & Casino, on Oct. 29, 2011, in Las Vegas.

Pictures: Stars' Halloween costumes 2012

Model and television personality Bridget Marquardt, wearing a "Zombie Bunny" costume from Roma Costume, attends the Gallery Nightclub at the Planet Hollywood Resort & Casino on Oct. 29, 2011, in Las Vegas.

Nicole "Snooki" Polizzi shows up in costume to her book signing for "Confessions of a Guidette" in Las Vegas on Oct. 30, 2011. The "Jersey Shore" star wore the "Playful Pussycat" costume by Roma Costume.

Pictures: Stars' Halloween costumes 2012

Stevie Wonder and Bette Midler attend Midler's Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.

Pictures: Stars' Halloween costumes 2012

Debra Messing attends Bette Midler's Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.

Carmelo Anthony attends Bette Midler's Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.

Pictures: Stars' Halloween costumes 2012

Bette Midler, second right, poses with cast members from the Broadway show "Priscilla, Queen of the Desert" at her Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.

Alan Cumming attends Bette Midler's Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.

Pictures: Stars' Halloween costumes 2012

Sandra Lee attends Bette Midler's Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.

Judy Gold, dressed as Chaz Bono, attends Bette Midler's Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.

Pictures: Stars' Halloween costumes 2012

Thalia Mottola attends Bette Midler's Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.

Lea Michele, dressed up as the Swan Queen, in a picture posted on her Twitter account on Oct. 29, 2011.

"Today" co-hosts Matt Lauer and Ann Curry dress up as Prince William and Kate Middleton on the set of NBC's "Today" 2011 Halloween Celebration at Rockefeller Plaza on Oct. 31, 2011, in New York.

Pictures: Stars' Halloween costumes 2012

"Today" host Natalie Morales dressed up as Pippa Middleton on the set of NBC's "Today" 2011 Halloween Celebration at Rockefeller Plaza on Oct. 31, 2011, in New York.

From left, "Today" hosts Kathie Lee Gifford, Hoda Kotbe, Natalie Morales, Ann Curry, former host Meredith Vieira, and Al Roker dress up as members of the royal family on the set of NBC's "Today" 2011 Halloween Celebration at Rockefeller Plaza on Oct. 31, 2011, in New York.

From left, Lara Spencer (as Lady Gaga), Biana Golodryga (as Beyonce), Robin Roberts (as Nicki Minaj) and Cameron Mathison (as a zombie) dress up on "Good Morning America" in New York on Oct. 31, 2011.

Lara Spencer and George Stephanopoulos dress up on "Good Morning America" in New York, Oct. 31, 2011.

Pictures: Stars' Halloween costumes 2012

Josh Elliott and Sam Champion of "Good Morning America" dress up on Oct. 31, 2011, in New York.

From left, Melissa Francis as Kourtney Kardashian, Jenna Wolfe as Khloe Kardashian, Lester Holt as Bruce Jenner, Amy Roebuck as Kim Kardashian and Janice Huff as Kris Jenner tape NBC's "Weekend Today" 2011 Halloween Celebration at Rockefeller Plaza on Oct. 30, 2011, in New York.

Actor Alan Cumming, right, and guests attend his Halloween party at the Soho Grand Hotel on Oct. 29, 2011, in New York.

Pictures: Stars' Halloween costumes 2012

Actor Matthew Perry, left, and guest attend Alan Cumming's Halloween party at the Soho Grand Hotel on Oct. 29, 2011, in New York.

TV personality Sam Champion, right, and guests attend Alan Cumming's Halloween party at the Soho Grand Hotel on Oct. 29, 2011, in New York.

Actress Morgan Fairchild attends the 2011 Pop Art Halloween party at the Top of the Rock's 620 Loft & Garden on Oct. 29, 2011, in New York.

Pictures: Stars' Halloween costumes 2012

TV personalities Alex McCord and Simon van Kempen attend the 2011 Pop Art Halloween party at the Top of the Rock's 620 Loft & Garden on Oct. 29, 2011, in New York.

TV personality Teresa Giudice attends the 2011 Pop Art Halloween party at the Top of the Rock's 620 Loft & Garden on Oct. 29, 2011, in New York.

Actress Tia Carrere attends the 2011 Pop Art Halloween party at the Top of the Rock's 620 Loft & Garden on Oct. 29, 2011, in New York.

Pictures: Stars' Halloween costumes 2012

Paul Hiffmeyer/Disney Parks via Getty Images

Actress Chloe Moretz celebrates Halloween Time with Minnie Mouse at Disneyland park on Oct. 24, 2011, in Anaheim, Calif.

Paul Hiffmeyer/Disneyland via Getty Images

Heidi Klum and Seal celebrate Halloween Time at Disneyland on Sept. 29, 2011, in Anaheim, Calif.

Roberto Gonzalez/Universal Orlando Resort via Getty Images

Singer Gloria Estefan poses with deceased souls while visiting "Winter's Night: The Haunting of Hawthorn Cemetery" haunted house during Universal Orlando's Halloween Horror Night 21 on Oct. 01, 2011, in Orlando, Fla.

Pictures: Stars' Halloween costumes 2012

AP Photo/The Martha Stewart Show, David M. Russell

TV host Martha Stewart, left, is adorned with moths for her alter-ego "Motha Stewart" as she poses with actor Justin Long, dressed as Teen Wolf, during the taping of the Martha Stewart Halloween primetime special in Katonah, N.Y., on Sept. 17, 2011. The special aired on Oct. 24.

Pictures: Stars' Halloween costumes 2012