Portia de Rossi

Actress, Known for"Ally McBeal" & "Arrested Development."

Kid Cudi

Rapper, Singer & Actor; Known for "Pursuit of Happiness" & "Man on the Moon"

Meghan McCain

Political Columnist, Author & Award-Winning Blogger

Glennon Doyle

Author, Activist & Founder of Together Rising

Lady Gaga

Grammy Award-Winning Pop Singer-Songwriter & Award-Winning Actress Known for "A Star is Born" & "Joker: Folie à Deux'; Founder of Haus Labs Cosmetics

Kelly Slater

Professional Surfer Crowned ASP World Champion a Record 11 Times, Spokesperson for Suicide Prevention & Awareness

Kelly Slater Talks Surfing at 50: 'There's Always Another Wave'

Katharine McPhee

American Pop Singer, Songwriter and Actress; Known for Her Role on NBC's "Smash"

Aloe Blacc

Singer-Songwriter, Rapper & Musician; Known for "I Need A Dollar" & "Wake Me Up"

Selena Gomez

Actress & Singer; Best Known for "Wizards of Waverly Place"

Jay Williams

Former NBA Player; CEO of Rising Stars Youth Foundation; ESPN Analyst

Eric Dane

Actor; Best Known for His Role as Dr. Mark Sloan in "Grey's Anatomy"

Fiona Apple

Grammy Award-Winning Singer-Songwriter, Pianist & Poet

Audra McDonald

Tony Award-Winning Actress & Singer

Gabourey Sidibe

Actress, Director, & Author Known for "Empire" & "Precious"

Lily Collins

Actress, Model & Author Best Known For "Emily in Paris"

Lily Collins - Vogue Scandinavia

Anika Noni Rose

Tony Award-Winning Actress & Singer; Voice of Princess Tiana

Bode Miller

Former World Cup Alpine Ski Racer; Olympic Gold Medalist & World Champion

Jean-Claude Van Damme

Belgian martial artist, actor, and director best known for his martial arts action films.

Zosia Mamet

Actress Known for Her Role in HBO's "Girls"

Ellen Langer

Mother of Mindfulness Theory; Social Psychologist; Authority on Leading and Living Boldly; Harvard University Professor