Laila Ali, Season 15
Known For: retired boxing world champion and daughter of Muhammad Ali
Brooke Burke-Charvet, Season 15
Known For: actress, TV host and CEO of ModernMom.com
Eric Dickerson, Season 15
Known For: pro football hall of fame running back
Boy George, Season 15
Known For: Grammy-winning singer
Matt Iseman, Season 15
Known For: American Ninja Warrior host
Carrie Keagan, Season 15
Known For: actress, writer and former host of VH1's Big Morning Buzz Live with Carrie Keagan
Carson Kressley, Season 15
Known For: Emmy-winning reality TV fixture and celebrity stylist
Lisa Leslie, Season 15
Known For: four-time Olympic gold medalist and WNBA champion
Jon Lovitz, Season 15
Known For: comedian and former Saturday Night Live star
Vince Neil, Season 15
Known For: lead vocalist of Mötley Crüe
Nicole "Snooki" Polizzi, Season 15
Known For: former star of Jersey Shore
Kyle Richards, Season 15
Known For: actress and star of Bravo's The Real Housewives of Beverly Hills
Chael Sonnen, Season 15
Known For: former UFC fighter and mixed martial artist
Porsha Williams, Season 15
Known For: singer and star of The Real Housewives of Atlanta
Ricky Williams, Season 15
Known For: Heisman Trophy winner for the University of Texas and ESPN sports analyst
Carnie Wilson, Season 15
Known For: singer and member of Wilson Phillips
Clay Aiken, Season 12
Known For: Singer, American Idol runner-up
Charity: National Inclusion Project
Adam Carolla, Season 12
Known For: Former Love Line Cohost
Charity: Catholic Big Brothers Big Sisters
Fired: Task 4
Victoria Gotti, Season 12
Known For: Author; Daughter of Crime Boss John Gotti
Charity: Association to Benefit Children
Fired: Task 2
Teresa Giudice, 12
Known For: Reality TV Star, Real Housewives of New Jersey
Charity: The NephCure Foundation
George Takei, Season 12
Known For: Actor (Star Trek)
Charity: Japanese American National Museum
Fired: Task 3
Michael Andretti, Season 12
Known For: IndyCar Series Driver
Charity: Racing for Cancer
Fired: Task 4
Tia Carrere, Season 12
Known For: Musician & Actress
Charity: After-School All-Stars
Fired: Task 5
Penn Jillette, Season 12
Known For: Magician and Comedian
Charity: Opportunity Village