Most Beautiful 2007

World's Most Beautiful Pop Quiz

From J.Lo to Dr. McDreamy, see how well you know last year's Most Beautiful stars. By Caryn Midler

Correct Answer: Getting enough sleep

The 36-year-old, who has graced PEOPLE's Most Beautiful issue six times, has said the secret to her glowing skin is getting a solid eight hours every night. "I don't think people realize how important sleep is for your skin, your face, your well-being or your head! I think the world is walking around sleep-deprived."