KRS-One

Rapper, Author & Activist

The Gospel of Hip Hop: The First Instrument

Branford Marsalis

Grammy Award-Winning Jazz Musician & Passionate Music Educator

Chief Keef

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

JJ Ramberg

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

George Kohlrieser

Organizational, Clinical & Police Psychologist; Former Hostage Negotiator

Lea Thompson

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

Brett Dennen

Folk/Pop Singer-Songwriter from Northern California

Lily Rabe

American stage, film and television actress

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"

Manuel Scott

Scholar, Author & Original "Freedom Writer"

Jason Wahler

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

Summer Sanders

Former Olympic Gold Medalist Swimmer; Sports Commentator

Michael Madsen

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

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"

Tim Daly

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

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.