Mark Cuban

Serial Entrepreneur, Investor & Owner of the Dallas Mavericks

Jeremy Lin

Professional Basketball Player for Beijing Ducks of the Chinese Basketball Association

John Cena

WWE Professional Wrestler, Bodybuilder, and Actor Known for "Trainwreck"

Anousheh Ansari

CEO of X Prize Foundation & First Female Private Space Explorer

Stephen A. Smith

Sports Journalist, Analyst & Talk Show Host Known for "First Take"

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 ...

Martina Navratilova

Retired World #1 Tennis Player, International Tennis Hall of Famer, Gay Rights Activist & Author

Sugar Ray Leonard

Legendary Sports Icon, Olympic Champion and Hall of Famer, Philanthropist, Bestselling Author & Television Personality

Billie Jean King

Former World #1 Professional Tennis Player & Sports Icon; Advocate for Women's Equality

Laila Ali

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