She may be better known for her roles in the '90s teen comedy Clueless and those racy Aerosmith videos, but actress Alicia Silverstone is also an avid vegan and conservationist. In her new book, she preaches the benefits of eating green and having it all: feeling good, looking great and saving the planet at the same time. There are no claims of guaranteed weight loss, just a guide to understanding, buying and preparing a balanced vegan diet. The results, Silverstone says, include effortless weight loss, clear skin, increased energy and smooth digestion. Not quite sold? Maybe the endorsement from Paul McCartney at the beginning of the book will do the trick.