Barbie So in Style Birthday Collection: The So In Style girls always celebrate in style and Sweet 16 birthday parties are no exception. These girls are ready to celebrate the special day in sassy party dresses with glitter accents and matching shoes. Birthday tiaras and cupcake purses complete the fun looks. Each Barbie S.I.S. So In Style doll sold separately. Collect the whole Barbie So In Style Doll Collection.