Dan Ariely

Behavioral Economist; Professor at Duke University; Author; Founding Member of The Center for Advanced Hindsight

Oprah Winfrey

CEO of Oprah Winfrey Network, Presidential Medal of Freedom Recipient & National Women's Hall of Famer

Oprah Winfrey: Broken Open | Oprah's Super Soul | OWN Podcasts ...

Tim Tebow

ESPN College Football Analyst; Heisman Trophy Winner; Former Quarterback for NFL's Denver Broncos & Baseball Outfielder for the New York Mets

Amy Purdy

Former "Dancing with the Stars" Contestant & Paralympic Professional Snowboarder

John Legend

EGOT Winning Musician, Producer & Philantropist

Priyanka Chopra Jonas

Award-Winning Actress, Producer & Humanitarian

Priyanka Chopra Jonas Takes a Lie Detector Test | Vanity Fair

Michelle Obama

Former First Lady of the United States & Bestselling Author

Pharrell Williams

Singer-Songwriter, Producer & Entrepreneur; Known for the Hit Single, "Happy"

Dan Marino

Pro Football Hall of Famer, Business Owner & Founder of the Dan Marino Foundation for Improving The Lives of Those on the Autism Spectrum

Luvvie Ajayi

New York Times Best-Selling Author, Podcast Host & Professional Troublemaker

Nick Vujicic

Motivational Speaker, NY Times Best-Selling Author, Founder & CEO of Life Without Limbs

Kurt Warner

Super Bowl Champion Quarterback and Two-Time NFL MVP; Adoption Advocate

Ashton Kutcher

Actor, Producer, Investor & Activist

Jane Lynch

Emmy Award-Winning Actress, Known for "Glee" and Hosting "Hollywood Game Night"

Brandon Marshall

Former NFL Pro Bowler, TV Personality, Mental Health Advocate, Founder, Host of I AM Athlete & CEO of House of Athlete

Steve Harvey

TV Personality & Host of "Family Feud"

Heather McGhee

Distinguished Senior Fellow & Former President of Demos, A Progressive Think Tank

John Elway

Hall of Fame NFL Legend; Executive VP of Football Operations for the Denver Broncos

Kelly Slater

Professional Surfer Crowned ASP World Champion a Record 11 Times, Spokesperson for Suicide Prevention & Awareness

Kelly Slater Talks Surfing at 50: 'There's Always Another Wave'

Larry Fitzgerald

Philanthropist, Business Owner, Investor & Former Wide Receiver for the National Football League