JJ Ramberg

Host of MSNBC's "Your Business" & Co-Founder, GoodSearch.com

George Kohlrieser

Organizational, Clinical & Police Psychologist; Former Hostage Negotiator

Jennifer Widerstrom

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

Jason Hewlett

Leadership Expert, Speaker Hall of Fame & Author of "How to Stand Out in a Sit Down World"

Brett Dennen

Folk/Pop Singer-Songwriter from Northern California

Manuel Scott

Scholar, Author & Original "Freedom Writer"

Jason Wahler

TV Personality, Known for "Laguna Beach" "The Hills" & "Celebrity Rehab", Recovery Advocate

Michael Madsen

Actor, Poet and Photographer; Known for "Reservoir Dogs" and "Kill Bill"

Lea Thompson

Actress, Director & Producer Known for "Back to the Future" Films and "Switched at Birth"; Alzheimer's Awareness Advocate

Branford Marsalis

Grammy Award-Winning Jazz Musician & Passionate Music Educator

Tim Daly

Emmy-nominated Actor and Advocate for Arts Awareness in Public Schools

Summer Sanders

Former Olympic Gold Medalist Swimmer; Sports Commentator

KRS-One

Rapper, Author & Activist

The Gospel of Hip Hop: The First Instrument

Greg Graffin

Lead Singer of Bad Religion & Professor of Biology at UCLA

Joan Baez

Legendary Folk Musician & Human Rights Activist

Robert Krulwich

American Radio & Television Journalist; Science Correspondent for NPR; Co-Host of "Radiolab"

Chief Keef

Rapper from Chicago Known for Songs Like "Love Sosa" and "I Don't Like"

Lily Rabe

American stage, film and television actress

Matt Costa

When Matt Costa first started writing for his fourth full-length album, he envisioned the end result as a stripped-down selection of rootsy folk songs.