Hayden Panettiere is mastering the art of dressing for her petite size (she's just over five feet tall), while still pulling off a playfully sophisticated, totally age-appropriate look. "There are all these little tricks that make such a difference," says the 19-year-old. "Like being conscious of when a shoe cuts me off at the ankle, so it doesn't shorten my legs." Here, the actress shows us some more-than-flattering heels and other girly essentials.