Bobbi Brown is an internationally renowned makeup artist, New York Times best-selling author, exclusive beauty editor at NBC's Today show, and founder of Bobbi Brown Cosmetics. Her products are sold in more than 900 stores worldwide. Bobbi lives with her husband and three sons in Montclair, New Jersey.

Rebecca Paley is a Brooklyn-based author whose work on beauty, culture, and fashion has appeared in the New York Times, People, and numerous books.

Hilary Duff is an actress and recording artist who lives in Los Angeles.

From best-selling author and famed makeup artist Bobbi Brown comes this definitive beauty book empowering teens and twenty-somethings with age-appropriate makeup tips, style secrets, and self-esteem boosters. Emphasizing natural beauty, Bobbi advises on the best products and tools for keeping skin of every type flawless, and shares step-by-step techniques for getting the prettiest hair, eyes, lips, and nails. Stunning makeovers inspire looks for school, parties, interviews, and beyond. With hundreds of photographs of real girls, shots of celebrity role models, and Bobbi's best tricks from her remarkable career in the cosmetics industry, Beauty Rules is the new go-to guide for all girls.