Personal photo
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.
AP Photo/Evan Agostini
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.
AP Photo/Evan Agostini
Actress Michelle Trachtenberg attends Heidi Klum's annual Halloween party at the Dream Hotel on Monday, Oct. 31, 2011, in New York.
Jemal Countess/Getty Images
Models Tyson Bedford and Shanina Shaik attend Heidi Klum's 12th annual Halloween party on Oct. 31, 2011, in New York.
AP Photo/Evan Agostini
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.
Jemal Countess/Getty Images
Model Nicole Trunfino attends Heidi Klum's 12th annual Halloween party on Oct. 31, 2011, in New York.
Jemal Countess/Getty Images
"Jersey Shore" star Vinny Guadagnino attends Heidi Klum's 12th annual Halloween party on Oct. 31, 2011, in New York.
Anthony Behar/Sipa Press via AP Images
Kim Kardashian, dressed up as Poison Ivy, attends the Midori Green Halloween costume party on Oct. 29, 2011, in New York.
Joe Coomber/Sipa Press via AP Images
Heidi Klum attends her 12th Annual Halloween party on Oct. 29, 2011, in Las Vegas.
Erik Kabik/Retna
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.
David Becker/WireImage
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.
Scott Harrison/RETNA
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.
AP Photo/Charles Sykes
Stevie Wonder and Bette Midler attend Midler's Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.
AP Photo/Charles Sykes
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.
AP Photo/Charles Sykes
Alan Cumming attends Bette Midler's Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.
AP Photo/Charles Sykes
Sandra Lee attends Bette Midler's Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.
AP Photo/Charles Sykes
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.
AP Photo/Charles Sykes
Thalia Mottola attends Bette Midler's Hulaween gala benefit for the New York Restoration Project, in New York, Oct. 28, 2011.
Personal photo
Lea Michele, dressed up as the Swan Queen, in a picture posted on her Twitter account on Oct. 29, 2011.
Stephen Lovekin/Getty Images
"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.
Stephen Lovekin/Getty Images
"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.
Stephen Lovekin/Getty Images
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.
ABC/Ida Mae Astute
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.
ABC/Ida Mae Astute
Lara Spencer and George Stephanopoulos dress up on "Good Morning America" in New York, Oct. 31, 2011.
ABC/Ida Mae Astute
Josh Elliott and Sam Champion of "Good Morning America" dress up on Oct. 31, 2011, in New York.
Neilson Barnard/Getty Images
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.
Neilson Barnard/Getty Images
Actor Alan Cumming, right, and guests attend his Halloween party at the Soho Grand Hotel on Oct. 29, 2011, in New York.
Neilson Barnard/Getty Images
Actor Matthew Perry, left, and guest attend Alan Cumming's Halloween party at the Soho Grand Hotel on Oct. 29, 2011, in New York.
Neilson Barnard/Getty Images
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.
Joe Corrigan/Getty Images
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.
Joe Corrigan/Getty Images
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.
Joe Corrigan/Getty Images
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.
Joe Corrigan/Getty Images
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.
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.
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.
