What allows the tight pants to work for her is that her legs have form. Obviously, she exercises, so her calves, her quads, and her hamstrings all lend attractive curves to the pants. An under-muscled person whose legs do not have form winds up looking insectoid in tight pants if the person is thin, but gelatinous if not thin. Being in shape is essential for this look to become a style rather than a fad when worn. Tight clothing is tricky, and its best accessory is exercise.