Erin Brockovich

Consumer Advocate, Author, TV Host & Environmental Activist

LeVar Burton

Literacy Advocate & Actor Known for "Roots," "Star Trek" & "Reading Rainbow"

Michelle Obama

Former First Lady of the United States & Bestselling Author

Steve Harvey

TV Personality & Host of "Family Feud"

Tyler Perry

Actor, Writer, Producer, Comedian & Director; CEO of Tyler Perry Studios

Whoopi Goldberg

Award-Winning Actress, Comedian & Co-Host of ABC's "The View"

Cheryl Burke

Professional Ballroom Dancer, Model, TV Host, Known for "Dancing with the Stars"

Robert Irvine

Celebrity Chef, Philanthropist & Author; Best Known for "Restaurant: Impossible"

Margaret Cho

Grammy Award-Nominated Comedian; Actress, Author & LGBT Advocate

Margaret Cho: Remove Your Investment in Pain

Alan Dershowitz

Harvard Law School Professor; Leading Expert in Civil Rights

John Dickerson

News Anchor for "CBS News Prime Time with John Dickerson"

Ricky Gervais

Award-Winning English Comedian & Actor; Known for "The Office" and "Extras"

Cecile Richards

Co-Founder of Supermajority & Gender Equity Advocate; Former President of Planned Parenthood

Julianne Hough

Emmy Award Winner for Outstanding Choreography, Country Music Singer, Actress & Professional Dancer

Barack Obama

44th President of the United States

Ann Curry

Anchor of "Chasing the Cure;" Former NBC Today Anchor, National & International Correspondent; Former Dateline Anchor

Sara Evans

Country Singer-Songwriter

Jonathan Safran Foer

Bestselling Author of "Everything Is Illuminated" and "Extremely Loud and Incredibly Close"

Mark Hyman

New York Times Bestselling Author & Healthcare Expert

Young Forever: The Emerging Science of Longevity | Summit Palm Desert

Wolf Blitzer

CNN's Lead Political Anchor & Host of CNN's "The Situation Room"