Ziauddin Yousafzai

Co-Founder of the Malala Fund

Gretchen Rubin

New York Times Best-Selling Author of "The Happiness Project;" Host of Podcast "Happier with Gretchen Rubin"

Gretchen Rubin - Knowing Yourself: Why You're Happy and You ...

Chris Hughes

Senior Fellow, Institute on Race, Power, and Political Economy; Co-founder of Facebook & Former Editor-in-Chief at The New Republic

Lori Greiner

Self-Made Mogul, Inventor & Entrepreneur Who Has Created 500+ Products; Known for "Shark Tank"

Diana Nyad

World Champion Swimmer, Storyteller, Sports Journalist & Broadcaster

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

Wilmer Valderrama

Actor, Producer, Activist & Television Personality

John Stossel

Emmy-Award Winning Journalist

Holly Robinson Peete

TV Personality & Autism Advocate

Gabrielle Bernstein

Founder of HerFuture.com & New-York Times Best-Selling Author

Judge Greg Mathis

Civil Rights Activist, Television Personality

Jodie Sweetin

Entrepreneur, Actress, Producer & Author

Alyssa Milano

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

Ted Nugent

Rock Musician, Author, & Humanitarian

Jeffrey Tambor

Emmy Award-Winning Actor of "Arrested Development," "The Hangover" & "Transparent"

Karrueche Tran

Model

Monica Potter

Actress; Best Known for Her Role on "Parenthood" and 'Wisdom of the Crowd"

Boris Kodjoe

Film and Television Actor; Model; "Soul Food" and "The Gospel"

Denis Leary

Comedian, Actor and Activist

Whitney Johnson

Disruptive Innovation Thought Leader, Author & Business Advisor

Richard Rawlings

Entrepreneur, Television Personality & Car Enthusiast: Know as the Host of "Fast N' Loud" on the Discovery Channel