Top 10 greenest celebs

5. Hayden Panettiere

Whatever you do, don’t get between this pint-sized hero and her dolphins! When Hayden isn’t killing it as an indestructible cheerleader, she’s out in the wild blue ocean helping Flipper escape the sharp ends of Japanese hunting harpoons, writing letters to Norway and Japan to protest their whale hunting practices and receiving the Compassion in Action award from PETA. Save the cheerleader, cheerleader saves the world!