(4 of 9) Beauty Evolution: Julia RobertsBlessed with natural beauty and magnetic charisma, Julia Roberts has kept audiences enthralled for years—even while constantly changing her look. So what’s her beauty secret? Why, that gorgeous grin of course. September 1998 Roberts oozes girl-next-door sex appeal with flawlessly tanned skin, toffee-color wavy wash-and-go hair, and a sly smile.