Asra Nomani

Journalist & Author, Women's Rights Activist

Biz Stone

Co-Founder of Twitter

Jeremy Rifkin

Leading Global Technologist, Futurist, Authority on World Economic & Environmental Trends

Mindy Grossman

President & CEO of WW International

Nastia Liukin

Olympic Gold Medal Gymnast

Mayim Bialik

Neuroscientist & Actress, Known For "The Big Bang Theory"

Soleil Moon Frye

Social Media Expert, Entrepreneur & Eco-Leader; Author of "Happy Chaos"; Alzheimer's Awareness Advocate

Dan Ariely

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

11 ways to stop procrastinating—for good | Tim Ferriss, Dan Ariely ...

Lisa Oz

Best-Selling Author, Producer, Host & Entrepreneur

Diana Nyad

First Person to Successfully Swim from Cuba to Florida Without the Protection of a Shark Cage; Sports Journalist & Broadcaster

Gabrielle Union

Actress, Voice Artist, Activist, Author

Maria Bello

Actress, Activist and Vital Voices Global Ambassador

John Mackey

Co-Founder & CEO, Whole Foods Market

Whole Foods Founder: ‘The Whole World Is Getting Fat’

Hoda Kotb

Broadcast Journalist, Television Personality, Author & Co-Anchor of "The Today Show"

I've Loved You Since Forever Board Book

Laila Ali

Undefeated Four-Time World Champion Boxer & Lifestyle Expert

Keri Glassman

Nutritionist, Author, Founder and CEO of Nutritious Life

Christy Turlington Burns

Model & Founder of Every Mother Counts; Anti-Smoking Activist

Holly Robinson Peete

TV Personality & Autism Advocate

Art Smith

Celebrity Chef, Author & Humanitarian; Served as the Personal Chef of Oprah Winfrey

Food: the polite protest | Art Smith | TEDxRiga

Chris Powell

Trainer and Transformation Specialist on ABC's "Extreme Makeover: Weight Loss Edition"