Demi Lovato

Grammy Nominated Singer-Songwriter, Musician, Philanthropist & Mental Health Advocate

Arnold Schwarzenegger

Actor, Producer, Director, Writer; California’s 38th Governor; Host of "Celebrity Apprentice"

Gabrielle Union

Actress, Voice Artist, Activist, Author & Investor

Bill Maher

Political Satirist & Host of HBO's "Real Time"

Natalie Portman

Award-Winning Actress Known for "Black Swan," "V for Vendetta" & Playing Padmé Amidala in the Star Wars Prequel Trilogy

Natalie Portman on self-confidence and performing from an early ...

Gina Rodriguez

Award-Winning Actress, Producer, Director, Model & Humanitarian

Joseph Gordon-Levitt

Founder of HitRecord & Actor Known for "Inception" & "The Dark Knight Rises"

Laila Ali

Undefeated Four-Time World Champion Boxer & Lifestyle Expert; Heart Disease Awareness Advocate

Amy Schumer

Award-Winning Actress & Comedian; Author of "The Girl with the Lower Back Tattoo;" Feminist Advocate

Amy Schumer diagnosed with rare health disorder: ‘Something was wrong’

Brittany Snow

Actress, Producer, Director, Singer & Co-Founder of Love Is Louder

Olivia Holt

Actress & Singer

Lily Tomlin

Actress & Comedian; Star of Netflix's "Grace and Frankie"

Nina Dobrev

Canadian Actress & Model; Best Known for "The Vampire Diaries" and "Degrassi"

Maureen McCormick

Actress & Author Best Known for "The Brady Bunch"

Diana Nyad

World Champion Swimmer, Storyteller, Sports Journalist & Broadcaster

Diana Nyad | The High-Performance Teamwork That Helped Her Make History

Jodie Sweetin

Entrepreneur, Actress, Producer & Author

Shay Mitchell

Actress Known for Her Role in "Pretty Little Liars"; Entrepreneur & CEO of Beis

Alyssa Milano

Actress, Author, Philanthropist & Founder of Touch by Alyssa Milano; Known for "Charmed" and "Who's the Boss"

Chaz Bono

Transgender, LGBTQ Rights Advocate, Author, Speaker

Reggie Watts

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