Shortly aferwards, she signed an exclusive contract with Ralph Lauren and Calvin Klein. Sturm remained in school and traveled to New York, Paris and Amsterdam to model.Sturm has posed for and appeared on the cover of many international fashion magazines such as Vogue, Harper's Bazaar, Elle, Marie Claire, Allure, Cosmopolitan, L'Officiel. Her advertising campaigns include Ralph Lauren, Calvin Klein, Emporio Armani, Giorgio Armani, Gianfranco Ferré, Versace, DKNY, Escada, H&M, and Carolina Herrera. Most recently she shot for Pantene, Garnier, Biotherm, XoXo, The J Lo Campaign, and Victoria's Secret.