Photos: Celebrities in their Halloween 2018 costumes Adam Lambert attends Just Jared's 7th Annual Halloween Party at Goya Studios on October 27, 2018 in Los Angeles, California. Photo by: Rodin_Eckenroth Photos: Celebrities in their Halloween 2018 costumes Paris Hilton attends the Casamigos Halloween Party on October 26, 2018 in Beverly Hills, California. Photo by: Michael Kovac Photos: Celebrities in their Halloween 2018 costumes Shauna Robertson (L) and Edward Norton attend the Casamigos Halloween Party on October 26, 2018 in Beverly Hills, California. Photo by: Michael Kovac Photos: Celebrities in their Halloween 2018 costumes Sarah Michelle Gellar attends the 2018 GOOD+ Foundation's 3rd Annual Halloween Bash presented by Delta Air Lines and Otter Pops on October 28, 2018 in Culver City, California.Photo by: Matt Winkelmeyer Photos: Celebrities in their Halloween 2018 costumes Kendall Jenner attends Casamigos Halloween party at CATCH Las Vegas at ARIA Resort & Casino on October 27, 2018 in Las Vegas, Nevada. Photo by: Bryan Steffy Photos: Celebrities in their Halloween 2018 costumes Actor George Clooney speaks to an interviewer during Casamigos & CATCH Halloween party at CATCH Las Vegas in ARIA Resort & Casino on October 27, 2018 in Las Vegas, Nevada.Photo by: Gabe Ginsberg Photos: Celebrities in their Halloween 2018 costumes Rande Gerber, Cindy Crawford, George Clooney and Mike Meldman attend Casamigos & CATCH Halloween party at CATCH Las Vegas in ARIA Resort & Casino on October 27, 2018 in Las Vegas, Nevada. Photo by: Gabe Ginsberg Photos: Celebrities in their Halloween 2018 costumes Just Jared (L) and Ireland Baldwin attend Just Jared's 7th Annual Halloween Party at Goya Studios on October 27, 2018 in Los Angeles, California. Photo by: Rodin Eckenroth Photos: Celebrities in their Halloween 2018 costumes Leona Lewis attends Just Jared's 7th Annual Halloween Party at Goya Studios on October 27, 2018 in Los Angeles, California. Photo by: Rodin_Eckenroth Photos: Celebrities in their Halloween 2018 costumes Singer Joey Fatone (L) receives a kiss from television personality Jonathan Scott during DJ Cassidy's performance at Casamigos & CATCH Halloween party at CATCH Las Vegas in ARIA Resort & Casino on October 27, 2018 in Las Vegas, Nevada.Photo by: Gabe Ginsberg Photos: Celebrities in their Halloween 2018 costumes Evan Ross attends Just Jared's 7th Annual Halloween Party at Goya Studios on October 27, 2018 in Los Angeles, California.Photo by: Rodin Eckenroth Photos: Celebrities in their Halloween 2018 costumes Television personality Jonathan Scott attends Casamigos & CATCH Halloween party at CATCH Las Vegas in ARIA Resort & Casino on October 27, 2018 in Las Vegas, Nevada.Photo by: Gabe Ginsberg Photos: Celebrities in their Halloween 2018 costumes Chair of Fatherhood Leadership Council, GOOD+ Foundation Jerry Seinfeld attends the 2018 GOOD+ Foundation's 3rd Annual Halloween Bash presented by Delta Air Lines and Otter Pops on October 28, 2018 in Culver City, California.Photo by: Emma McIntyre Photos: Celebrities in their Halloween 2018 costumes Rumer Willis attends Just Jared's 7th Annual Halloween Party at Goya Studios on October 27, 2018 in Los Angeles, California. Photo by: Rodin Eckenroth Photos: Celebrities in their Halloween 2018 costumes Ike Barinholtz, Erica Hanson, Payton June Barinholtz, Foster Barinholtz attends the 2018 GOOD+ Foundation's 3rd Annual Halloween Bash presented by Delta Air Lines and Otter Pops on October 28, 2018 in Culver City, California.Photo by: Matt Winkelmeyer Photos: Celebrities in their Halloween 2018 costumes Aubrey Anderson-Emmons attends the 2018 GOOD+ Foundation's 3rd Annual Halloween Bash presented by Delta Air Lines and Otter Pops on October 28, 2018 in Culver City, California.Photo by: Matt Winkelmeyer Photos: Celebrities in their Halloween 2018 costumes (L-R) Lola Jolie Thomas, Aonika Laurent, Luc Laurent Thomas and Sean Patrick Thomas attend the 2018 GOOD+ Foundation's 3rd Annual Halloween Bash presented by Delta Air Lines and Otter Pops on October 28, 2018 in Culver City, California. Photo by: Matt Winkelmeyer Photos: Celebrities in their Halloween 2018 costumes (L-R) Olivia Munn, Rande Gerber and Cindy Crawford attend the Casamigos Halloween Party on October 26, 2018 in Beverly Hills, California. Photo by: Michael Kovac Photos: Celebrities in their Halloween 2018 costumes (L-R) DJ Cassidy, actor J. B. Smoove and Catch Hospitality Group co-founder Mark Birnbaum attend Casamigos & CATCH Halloween party at CATCH Las Vegas in ARIA Resort & Casino on October 27, 2018 in Las Vegas, Nevada. Photo by: Gabe Ginsberg Photos: Celebrities in their Halloween 2018 costumes LAS VEGAS, NV - OCTOBER 27: Actor J. B. Smoove takes a selfie during DJ Cassidy's performance at Casamigos & CATCH Halloween party at CATCH Las Vegas in ARIA Resort & Casino on October 27, 2018 in Las Vegas, Nevada. Photo by: Gabe Ginsberg Photos: Celebrities in their Halloween 2018 costumes Matthew Morrison and Renee Puente attend the 2018 GOOD+ Foundation's 3rd Annual Halloween Bash presented by Delta Air Lines and Otter Pops on October 28, 2018 in Culver City, California. Photo by: Matt Winkelmeyer