AJ McLean

Singer, Songwriter and member of the Backstreet Boys

AJ McLean Opens Up About His 20-Year Drug Addiction Battle ...

Andy Puddicombe

Co-Founder of Headspace

Bar Refaeli

Israeli Model

Billie Lourd

"Booksmart" and "Scream Queens" Actress, Daughter of Carrie Fisher

Billy Bob Thornton

Actor, Screenwriter; Known for "Armageddon"

Courteney Cox

Actress, Producer & Director

Daniel Amen

Award-Winning Psychiatrist & Best Selling Author

Raising Mentally Strong Kids: How to Combine the Power of Neuroscience with Love and Lo...

Denise Richards

Actress, Former Fashion Model & Reality Star on Bravo's "The Real Housewives of Beverly Hills"

Drew Brees

Philanthropist & Former Super Bowl MVP-Winning Quarterback for the New Orleans Saints

Dustin Hoffman

American Actor with a Career in Film, Television, and Theatre Since 1960

Fiona Apple

Grammy Award-Winning Singer-Songwriter, Pianist & Poet

George Lopez

Stand-Up Comedian, Television Personality, Actor & Kidney Disease Spokesperson

Gigi Hadid

Fashion Model and TV Personality

Gwen Stefani

Three-Time Grammy Award Winner, Singer-Songwriter, Coach on "The Voice," Fashion Designer & Entrepreneur

Hunter Tylo

Renowned Soap Opera Actress and Child Activist

Jason Priestley

Canadian-American Actor & Director Best Known for "Beverly Hill, 90210"

Jeanette Jenkins

Founder & President of The Hollywood Trainer Fitness Company

Jenifer Lewis

Actress Known as the "Mother of Black Hollywood"; Famous for her Roles in "Think Like a Man", "The Princess Frog", & "Black-ish"

Jenny McCarthy

Actress, Host & Judge on Fox's "The Masked Singer"; Beauty Entrepreneur & Founder of Formless Beauty

Jessica Simpson

International Music Superstar, Bestselling Author & Entrepreneur