Jason Silva

Emmy-nominated TV Personality; Futurist; Host of National Geographic Channel’s “Brain Games”

Nastia Liukin

Olympic Gold Medal Gymnast

Mayim Bialik

Neuroscientist, Mental Health Advocate & Actress Known for "The Big Bang Theory"

Maria Menounos

CEO & Co-founder of AfterBuzz TV; Former E! News Co-Anchor; Best-selling Author, Journalist & Type-1 Diabetic

Mark Cuban

Serial Entrepreneur, Investor & Owner of the Dallas Mavericks

Stephen A. Smith

Sports Journalist, Analyst & Talk Show Host Known for "First Take"

Rainn Wilson

Actor Known for "The Office" & Creator of SoulPancake

Soul Boom: Why We Need a Spiritual Revolution

Hoda Kotb

Award-Winning Broadcast Journalist, Television Personality, Author & Co-Anchor of NBC News' TODAY

Ross Mathews

Host of Hello Ross! & Author of "Man Up: Tales of My Delusional Self-Confidence"

Soledad O'Brien

Award Winning Journalist, Documentarian, News Anchor, Producer, Entrepreneur & Philanthropist

Laila Ali

Undefeated Four-Time World Champion Boxer & Lifestyle Expert; Heart Disease Awareness Advocate

Judge Greg Mathis

Civil Rights Activist, Television Personality

Tracee Ellis Ross

Actress, Producer; Chief Executive Officer at PATTERN

Holly Robinson Peete

TV Personality & Autism Advocate

Christy Turlington Burns

Model & Founder of Every Mother Counts; Anti-Smoking Activist

Tim Meadows

Actor & Comedian; Known for "Saturday Night Live"

Jesse Tyler Ferguson

Actor & LGBTQ Activist; Best-Known for “Modern Family”

Andrew Zimmern

Four-Time James Beard Award-Winning TV Personality, Chef, Writer & Teacher

John Oliver

Emmy-Winning Comedian, Best Known for "The Daily Show with Jon Stewart" & "Last Week Tonight"

Buddy Valastro

Host of "The Cake Boss" & "The Next Great Baker"