Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

Danny Trejo

Actor, Author, Activist & Restaurateur; Recovery & Intervention Counselor for Troubled Youth

Sophia Bush

Actress, Humanitarian & Author

Joel Sartore

National Geographic Photographer & Author

Maggie Q

TV & Film Actress, Known for Lead Role in CW's "Nikita"

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Cesar Millan

Host of The Dog Whisperer; Author of Cesar's Way

Robert Ballard

Renowned Ocean Explorer & Scientist

David Suzuki

Environmentalist & Scientist; Co-Founder of the David Suzuki Foundation

Adrian Grenier

Actor Known for HBO's "Entourage"; Environmental Activist; UN Ambassador

Jillian Michaels

Leading Fitness Expert, Certified Nutritionist, Renowned Life Coach & Powerful Entrepreneur

Sophie Gregoire-Trudeau

Celebrated Mental Health & Gender Equality Advocate; Author of "Closer Together: Knowing Ourselves, Loving Each Other"

Closer Together: Knowing Ourselves, Loving Each Other

Village People

American Disco Band; Epitome of the Disco Culture of the Late 70's and 80's

Amy Smart

Actress, Environmentalist & Co-Founder of Smart House Collections

Lisa Edelstein

Actress, Director, Writer & Producer

Alicia Silverstone

Actress & Animal Rights Activist

Elayne Boosler

Comedian & Advocate for Animal Rescue; Founder of Tails of Joy

Denise Richards

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

Moby

Musician, DJ, Photographer

Tim Gunn

Fashion Icon, Former Co-Host & Mentor of "Project Runway"