Serena Williams

Iconic Professional Tennis Player & Olympic Gold Medalist; Activist, Philanthropist & Entrepreneur

'DiversiTEA with Naomi Wadler': Naomi & Tennis Champion Serena ...

Jillian Michaels

Leading Fitness Expert & Life Coach; Television Personality Known for "The Biggest Loser"

Jillian Michaels at the First Health Matters

Bob Harper

Personal Trainer & Former Host of "The Biggest Loser"; Heart Attack Survivor

Health, Fitness Expert Bob Harper on life after heart attack

Marc Brown

Children's Book Author & Creator of "Arthur"

Dr. Mehmet Oz

Cardiothoracic Surgeon & Host of "The Dr. Oz Show"; Columbia University Professor & Author

Interview with Dr. Mehmet Oz, Host, The Dr. Oz Show

Shaquille O'Neal

15-Time NBA All-Star Player, Media Personality, Entrepreneur & Philanthropist

Gabby Douglas

First African-American to Win Olympic Gold Medal for Gymnastics; Author of New York Times Bestseller "Grace, Gold & Glory: My Leap of Faith"

The 2017 MAKERS Conference: Gabby Douglas Stay in Your Joy ...

Colin Kaepernick

NFL Quarterback & Activist

Rachael Ray

Chef, Author & Host of the "Rachael Ray Show"

Rachael Ray 50: Memories and Meals from a Sweet and Savory Life: A Cookbook

Keri Hilson

Singer, Songwriter & Actress; Known for "Knock You Down" and "Pretty Girl Rock"

Dr. Ian Smith

Medical Contributor & Co-Host of "The Rachael Ray Show"; Doctor & New York Times Bestselling Author

2011 Academic Festival: Keynote Address by Dr. Ian Smith

Delta Burke

TV, Stage and Film Actress and Comedian; "Designing Women"

Peter Attia

Leader in Fight Against Diabetes and Obesity; Co-Founder, Nutrition Science Initiative; Former Surgeon and McKinsey Consultant

Sunny Anderson

Co-Host, Food Network's "The Kitchen"

Dariush Mozaffarian

Cardiologist, Dean & Jean Mayer Professor at the Tufts Friedman School of Nutrition Science and Policy at Tufts Medical School

Dariush Mozaffarian: Poor health primarily caused by food - YouTube

Beyonce Knowles

American Singer, Songwriter, Record Producer, Actress and Designer

Jordin Sparks

Pop and R&B Vocalist; American Idol Winner

Spike Mendelsohn

Chef & Restaurateur; Correspondent, CBS 'Early Show'

David Ludwig

Founding Director of Optimal Weight for Life at Children's Hospital

Kim Lyons

Fitness Expert, Former Trainer on "The Biggest Loser"