Laila Ali

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

Mark Cuban

Serial Entrepreneur, Investor & Owner of the Dallas Mavericks

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 ...