S. Epatha Merkerson

Actress; Best known for her role as Lt. Anita Van Buren on the acclaimed hit drama "Law & Order"

Petra Nemcova

International Supermodel & Tsunami Survivor

Dr. Shelley Sykes

The Happiness Guru

Wade Hayes

Country Western Singer; Healthcare Advocate; Cancer Survivor

Gary S. Kaplan

Healthcare Administration Leader

Paul J. Diaz

CEO Kindred Healthcare, Inc.

Peter Ubel

Behavioral Scientist Physician; Marketing Professor at Duke University

Kelly English

Food & Wine Magazine's "Best New Chef" 2009; Owner, Restaurant Iris

Stephanie Abrams

Meteorologist, currently working for The Weather Channel, based in New York City. She currently co-hosts Wake Up With Al and is a Field Reporter.

Jennifer Widerstrom

Newest Trainer on "The Biggest Loser;" Former Star of NBC’s "American Gladiators"

Edward Whitacre

Former CEO of AT&T and General Motors and author of "American Turnaround: Reinventing AT&T and GM and the Way We Do Business in the USA"

Katie Workman

Cook, Founding Editor in Chief of Cookstr.com, Author of "The Mom 100 Cookbook" & "Dinner Solved!"

Jon B. Alterman

Zbigniew Brzezinski Chair in Global Security and Geostrategy and Director, Middle East Program

Hubert Keller

French Celebrity Chef, Bravo TV Personality

Nancy Andreasen

Neuroscientist; Andrew H. Woods Chair of Psychiatry and Director, Iowa Neuroimaging Consortium, University of Iowa

Fabulous Beekman Boys (Dr. Brent Ridge + Josh Kilmer-Purcell)

Founders, Beekman 1802 and Stars of Cooking Channel's "The Fabulous Beekman Boys"

Tara Brach

Author & Mindfulness Teacher; Host of the "Tara Brach" Podcast

Trusting the Gold: Uncovering Your Natural Goodness

Alysia Reiner

Actor, Activist & Entrepreneur

Johann Hari

Journalist & Best-Selling Author of "Chasing the Scream"

Magic Pill: The Extraordinary Benefits and Disturbing Risks of the New Weight-Loss Drugs

Richard Sherman

Former All-Pro NFL Cornerback; NFL Analyst & Commentator; Co-host of 'Undisputed'