Nick Jonas

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

Jessica Simpson

International Music Superstar, Bestselling Author & Entrepreneur

Rita Wilson

Actress, Producer & Singer Known for "Sleepless in Seattle;" Alzheimer's Advocate

J. Cole

Hip-Hop Recording Artist & Record Producer Known for "Power Trip" and "Work Out"

Jordin Sparks

Pop and R&B Vocalist; American Idol Winner

Khloe Kardashian

Reality TV Personality, Entrepreneur, Author & Founding Partner of "Good American"

Rich Roll

Athlete, Wellness Advocate, Motivational Speaker, Addiction Survivor & Author

Tracy Morgan

Comedian, Former SNL Cast Member & Actor on NBC's "30 Rock"

Christopher Nolan

Academy Award-Winning British Film Director, Screenwriter & Producer

Christopher Nolan Wins Best Director – Motion Picture

Julianne Moore

Academy Award & Emmy Award-Winning Actress

Robin Thicke

American R&B and Soul Singer-Songwriter Known for the Hit "Blurred Lines"

Portia de Rossi

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

Christina Hendricks

Actress Known for her Role as Joan Holloway in AMC's "Mad Men"

Bassem Youssef

Egyptian Comedian, Host of the "The Program" & Cardiac Surgeon

Oscar Nunez

Cuban-American Actor & Comedian Known for Playing Oscar Martinez on NBC's "The Office"

Jennifer Grey

Actress Known for "Dirty Dancing" & "Ferris Bueller's Day Off"; Winner of Season 11 of "Dancing with the Stars"

Shailene Woodley

Actress & Environmental Activist

Michelle Branch

Singer, Songwriter, Guitarist & Grammy-Winning Musician

Shirley MacLaine

Academy Award-Winning Actress & Author

Adam Lambert

Singer-Songwriter and Stage Actor; Contestant on "American Idol"