Melissa Rauch

Actress, Writer & Stand-Up Comic, Best known for "The Big Bang Theory"

Jennifer Pahlka

Deputy Chief Technology Officer At The White House Office of Science and Technology Policy; Founder of Code for America

Recoding America: Why Government Is Failing in the Digital Age and How We Can Do Better

Brian Williams

Former Anchor and Managing Editor, "NBC Nightly News" and "Rock Center with Brian Williams"

Robert Cialdini

New York Times Best-Selling Author; The Foundational Expert in the Science of Influence & Persuasion

Nassim Nicholas Taleb

Distinguished Professor of Risk Engineering & Co-Director of the Research Centre for Risk Engineering at the Polytechnic Institute of New York University

Rachel Zoe

Celebrity Stylist, Fashion Designer, Author, Talk Show Host of "Fashionably Late With Rachel Zoe"

Nick Vujicic

Motivational Speaker, NY Times Best-Selling Author, Founder & CEO of Life Without Limbs

Gretchen Rubin

New York Times Best-Selling Author of "The Happiness Project;" Host of Podcast "Happier with Gretchen Rubin"

Gretchen Rubin - Knowing Yourself: Why You're Happy and You ...

Lori Greiner

Self-Made Mogul, Inventor & Entrepreneur Who Has Created 500+ Products; Known for "Shark Tank"

Amy Schumer

Award-Winning Actress & Comedian; Author of "The Girl with the Lower Back Tattoo;" Feminist Advocate

Amy Schumer diagnosed with rare health disorder: ‘Something was wrong’

Kristin Cavallari

TV Personality, Fashion Designer, Bestselling Author & Founder of the Lifestyle Brand Uncommon James

True Comfort: More Than 100 Cozy Recipes Free of Gluten and Refined Sugar: A Gluten Fre...

Keenen Ivory Wayans

Comedian, Director & Writer; Known for "White Chicks" and "In Living Color"

Demi Lovato

Grammy Nominated Singer-Songwriter, Musician, Philanthropist & Mental Health Advocate

Rachael Ray

Chef, Cookbook Author & Television Host Known for the "Rachael Ray Show"

Charlie Rose

Anchor and Executive Editor

Sinbad

Stand-Up Comedian & Actor

Sinbad is back after a stroke: ‘Miracles happen’

Queen Latifah

Singer-Songwriter, Rapper, Actress, Television & Record Producer, Talk Show Host

Ted Nugent

Rock Musician, Author, & Humanitarian

Kathy Bates

Academy Award-Winning Actress; Cancer Survivor & Chairperson for the Lymphatic Education & Research Network

Lee Daniels

Director, Writer & Producer Known for "Precious" and "Empire"; Creator of Lee Daniels Entertainment

Anousheh Ansari

CEO of X Prize Foundation & First Female Private Space Explorer

Martina Navratilova

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

Key & Peele

Stars of the Original 'Sketch-Comedy Show' on Comedy Central

Jonah Lehrer

Neuroscientist, New York Times bestselling author of "Imagine: How Creativity Works"

Sofia Vergara

Actress, Entrepreneur, Comedian Known for "Modern Family"

Niecy Nash

Emmy Award-Winning Actress Known for Starring as Desna Simms on "Claws"

David Robinson

Former NBA Center for the San Antonio Spurs & Philanthropist

Rashida Jones

Actor, Writer and Producer; Best Known for Roles in "The Office" & "Parks and Recreation"

Julie Andrews

Singer, Actress, Author & Humanitarian

Kelly Osbourne

Fashion Designer, Singer & Actress; Former Contributor to E!'s "Fashion Police"; Daughter of Ozzy and Sharon Osbourne