Denise Richards

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

Pamela Anderson

Actress, Model, Producer & Animal Rights Advocate

Pink

Singer-Songwriter, Actress, Philanthropist & Environmental Activist

Paul McCartney

Former Member of The Beatles; One of the Most Successful Composers & Performers of All Time

Mena Suvari

Actress Known for "American Beauty" & Author of "The Great Peace: A Memoir"

Lisa Edelstein

Actress, Director, Writer & Producer

Jason Biggs

Actor Known For His Roles in the "American Pie" Series and on "Orange Is The New Black" Among Others

Portia de Rossi

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

Sarah McLachlan

Singer-Songwriter & Activist

Maggie Q

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

Neko Case

Neko Case is an American singer-songwriter, best known for her solo career and her contributions as a member of the Canadian indie rock group The New Pornographers

Tom Hardy

English Actor Known for "This Means War," "The Dark Knight Rises," "Inception." & "Mad Max"

Mo Rocca

CBS News Correspondent & Television Personality; Author of "Mobituaries" and "All the Presidents' Pets"

Leona Lewis

Singer, Songwriter & Animal Welfare Activist; Best Known for "Bleeding Love"

Chrissie Hynde

Singer, Songwriter, and Musician; Best Known as the Lead Singer of the Rock Band "The Pretenders"

Christiana Figueres

Expert on Global Climate Change; Former Executive Secretary of the UN Framework Convention on Climate Change

Dennis Dimick

Former Executive Environment Editor at National Geographic Magazine

Kristin Davis

Actress Best Known for her Role as Charlotte on "Sex & the City"

Yao Ming

President of Chinese Basketball Association, NBA Hall-of-Famer & Founder of the Yao Family Wines

Yao Ming's 2016 Hall of Fame Induction Speech

Mark Ruffalo

Actor, Director, Producer, Screenwriter & Environmental Activist