Jack Stack

Founder and CEO of SRC Holdings Corporation

Harley Pasternak

Diet & Fitness Expert; Best-Selling Author

Martin Luther King III

Civil Rights Activist, Global Humanitarian & Political Leader

Carl Lewis

9-Time Olympic Gold Medalist in Track & Field; Founder of The Carl Lewis Foundation

Natalie Maines

Singer-Songwriter & Activist; Best Known for Being Lead Singer of the Dixie Chicks

David Christian

David Christian teaches an ambitious world history course that tells the tale of the entire universe -- from the Big Bang 13 billion years ago to present day.

Dave Portnoy

Owner and Founder of Barstool Sports

Grand Funk Railroad

Grand Funk Railroad (also known as Grand Funk) is a legendary American rock band

Desi Lydic

Actress & Comedienne Known for MTV's "Awkward;" Correspondent on "The Daily Show"

Michelle Williams

Gospel Artist & Former Member of Destiny's Child

Checking In: How Getting Real about Depression Saved My Life---and Can Save Yours

Richard Kelly

Managing Director, IDEO

Janice Howroyd

Founder & CEO of The ActOne Group; The First African American Woman to Own a $1 Billion Brand

Dayana Mendoza

Former Beauty Queen, Founder of the Dayana Mendoza Shop, TV Host & AIDS Advocate

James McBride

New York Times Best-Selling Author & Musician

Dr. Jill Biden

First Lady of the United States

Jeff Koons

Visual Artist & Sculptor

Jeff Koons explains some of his most famous works | 60 Minutes ...

Toby Cosgrove

Executive Advisor & Former CEO & President at Cleveland Clinic

Elizabeth Cutler

Co-Founder at SoulCycle

Meredith Whitney

Founder & CEO of Meredith Whitney Advisory Group; Influential Financial Analyst Known as "The Oracle of Wall Street"

Meredith Whitney - Yahoo Finance

Jim Clifton

CEO of Gallup