Alex Newell

Grammy Award-Winning Actor & Singer Known for "Glee"

Wil Wheaton

Actor, Author & Blogger; Known for "Star Trek: The Next Generation" & "The Big Bang Theory"

Sean Astin

Actor, Director, Voice Artist & Producer Known For "Lord of the Rings"

Jeannie Mai

Fashion Correspondent Known for "The Real" & "How Do I Look?", Two-Time NAACP Image Awards and Daytime Emmy Award Winner

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Marlee Matlin

Academy Award Winning Actress; Healthcare Advocate & Disability Rights Activist Fighting for Better Access for the Deaf

Adam Richman

Host of Man v. Food & Man v. Nation

Robert Ballard

Renowned Ocean Explorer & Scientist

Reggie Watts

Comedian & Musician; Bandleader of the IFC Talk Show "Comedy Bang! Bang!"

Amanda Seales

Poet, Spoken Word Artist & Media Personality Known for HBO's "Insecure;" Anti-Smoking Activist

Caroline Rhea

Stand-up Comedian, Actress & Television Host

Caroline Rhea Stand-Up: Dating, Astrology and Having a Teenage Daughter

Kathy Najimy

Award-Winning Actress & Activist

Dan Abrams

Chief Legal Affairs Anchor at ABC News & Founder of Abrams Media

Ty Pennington

Television Personality, Home Makeover Guru & Author

Lisa Oz

Best-Selling Author, Producer, Host & Entrepreneur

Gloria Gaynor

Grammy Award-Winning Disco Singer Known for "I Will Survive"; Speaker on Domestic Violence

Mark Spitz

Legendary Olympic Swimmer; Third Athlete to Win Nine Olympic Gold Medals

Mark Spitz on the 1972 Olympic Games in Munich

Peter Salgo

Healthcare Futurist, Emmy Award-Winning Health & Science Correspondent & Author of "The Heart of the Matter"

Alicia Silverstone

Actress & Animal Rights Activist

Linda Armstrong Kelly

Single Mother of Lance Armstrong; Philanthropist & Advocate for Children