RACHEL BILSON

Voted sexiest in her senior class, Bilson, 25, a star of FOX's The O.C., figured out her formula early on. Drugstore deal: 99￠ Wet 'n' Wild white eyeliner. "I've always used Wet 'n' Wild! A light liner on the inside of your eyes really opens them up." Biggest don't: "The brown lip liner with pink lipstick phase in junior high." Comes with the package: Boyfriend and costar Adam Brody "loves my freckles."