Once the darling of Disney, Selena Gomez has grown up before our eyes. Gone are her Converse kicks and fresh-faced looks. "I'm always gonna look back and say, 'Why on earth did I wear that?'" she admits to Life & Style. Now at 19, she's choosing body-baring outfits and dramatic makeup. "She's dressing sexier because she's ready to develop a more mature fan base," says an insider.