Michael Phelps

Retired Professional Swimmer; Most Decorated Olympic Athlete in History

Tyra Banks

Host & Executive Producer, "Dancing With the Stars"; Model, TV Personality, Host of "America's Next Top Model"

Pentatonix

Grammy Award-Winning Vocal Sensations & Winners of Season 3 of NBC’s 'The Sing-Off'

Marcus Lemonis

Serial Entrepreneur, Investor and Leadership Expert; Chairman and CEO of Camping World; Star of CNBC 'The Profit', 'Streets of Dreams' and HGTV's 'The Renovator'; Philanthropist and Founder of The Lemon-AID Foundation

Kevin Hart

Actor & Comedian

MC Hammer

Hip Hop Recording Artist, Record Producer & Entrepreneur

Ryan Seacrest

Radio Personality, TV Host & Producer Best Known for "American Idol" and "On Air with Ryan Seacrest"

LeAnn Rimes

Grammy Award-Winning Country Singer, Actress & Author; Known for "Blue" and "How Do I Live"

Kim Kardashian

Reality TV Personality, Fashionista, Mother

Kris Jenner and Kim Kardashian West speak at NYT DealBook ...

Jillian Harris

Reality TV Personality, Host of "Love It or List It Vancouver", Interior Designer & Lifestyle Expert

Lisa Rinna

Author, Actress & Television Personality

Theo Von

Actor, Comedian & Host of "This Past Weekend" Podcast

Katharine McPhee

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

Kourtney Kardashian

Reality TV Star, Mother, Healthy Living Advocate

Steven Tyler

Aerosmith Lead Singer & Former 'American Idol' Judge

Sarah Palin

Former Governor of Alaska; 2008 Vice Presidential Nominee

Scotty McCreery

Country Music Singer and Winner of American Idol Season 10

Go Big or Go Home: The Journey Toward the Dream