Mark Ruffalo

Actor, Director, Producer, Screenwriter & Environmental Activist

Priyanka Chopra Jonas

Award-Winning Actress, Producer & Humanitarian

Priyanka Chopra Jonas Takes a Lie Detector Test | Vanity Fair

Robert Greene

New York Times Bestselling Author of "The 48 Laws of Power," "The Art of Seduction," "The 33 Strategies of War," and "The 50th Law"

Guillermo del Toro

Academy Award Winning Filmmaker & Author; Best Known for "Pinocchio," "The Shape of Water," Pan's Labyrinth," and "Hellboy"

Jessica Simpson

International Music Superstar, Bestselling Author & Entrepreneur

Rita Wilson

Actress, Producer & Singer Known for "Sleepless in Seattle;" Alzheimer's Advocate

Shailene Woodley

Actress & Environmental Activist

Janice Howroyd

Founder & CEO of The ActOne Group; The First African American Woman to Own a $1 Billion Brand

Jake Gyllenhaal

Academy Award-Nominated & BAFTA Award-winning Actor; Environmental Activist

Oliver Stone

Oscar-Winning Director

Jeanette Jenkins

Founder & President of The Hollywood Trainer Fitness Company

Shannen Doherty

Actress, Producer, Author & TV Director; Breast Cancer Survivor

Shannen Doherty Wants to "Embrace Life"

Steve Nash

Former Head Coach of the Brooklyn Nets; Hall-of-Fame Basketball Player; Founder of the Steve Nash Foundation

Michelle Phan

Make-Up Artist, Entrepreneur, YouTube Personality; Founder of ipsy and EM Cosmetics

One Direction

Boy Band Who Gained Fame on Britain's "The X Factor"

Gwen Stefani

Three-Time Grammy Award Winner, Singer-Songwriter, Coach on "The Voice," Fashion Designer & Entrepreneur

Kaskade

Producer, Songwriter and DJ

Val Kilmer

Actor Known for his Roles in "Batman Forever" and "Top Gun," Among Others

Omar Epps

Actor Best Known for the Conspiracy Thriller "SHOOTER"; Author of "From Fatherless to Fatherhood"

Dash Mihok

American Actor; currently starring in Showtime's "Ray Donovan" alongside Liev Schreiber and Jon Voight