Mayim Bialik

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

Amandla Stenberg

Actor, Singer & Activist Known for "The Hate U Give," "The Hunger Games" & "Everything, Everything"

Jonathan Van Ness

Hair & Beauty Expert, Author, Television Personality; Known for Netflix's "Queer Eye"

Demi Lovato

Grammy Nominated Singer-Songwriter, Musician, Philanthropist & Mental Health Advocate

Tig Notaro

Grammy Award-Nominated Stand-Up Comic, Writer, Radio Contributor & Breast Cancer Survivor

Jessica Alba

Actress; Entrepreneur; Founder & CEO of The Honest Company

Yvonne Orji

Actress, Comedian & Writer Known for HBO's "Insecure"

Mark Ruffalo

Actor, Director, Producer, Screenwriter & Environmental Activist

Shaun White

Retired Professional Snowboarder & Skateboarder, Olympic Gold Medalist & Musician

Alicia Silverstone

Actress & Animal Rights Activist

Colton Haynes

Actor; Best Known for "Teen Wolf" & "Arrow"

Josh Peck

Actor & Social Media Influencer

Derek Hough

Dancer, NYT Bestselling Author, Emmy Award Winner for Outstanding Choreography & Six-Time Champion of ABC's "Dancing with the Stars"

Iliza Shlesinger

Comedian & Winner of NBC's "Last Comic Standing"

Iliza Shlesinger - "Hot Forever" Official Trailer | Netflix

Henry Winkler

Actor, Producer, Director & Best-Selling Author; Best Known for "Happy Days"

Dr. Drew Pinsky

Physician, Addiction Medicine Specialist, TV Host, Author & Podcaster

Dave Navarro

Musician & Host of "Ink Master"; Best Known as a Member of Jane's Addiction & Former Member of Red Hot Chili Peppers

Jason Alexander

Actor, Writer & Director; Best Known for His Work on "Seinfeld"

Chaz Bono

Transgender, LGBTQ Rights Advocate, Author, Speaker

Nick Jonas

Multi-Platinum & Grammy Nominated Recording Artist, Actor, Award-Winning Songwriter, Member of the Jonas Brothers & Diabetes Advocate