Who's that girl? It's Cara Delevingne! The English model-actress became one of the most recognizable faces in fashion in 2013 after posing for Burberry and Chanel and working the catwalk for the likes of Jason Wu, Oscar de la Renta, and Dolce & Gabbana. Before stealing the spotlight at London Fashion Week, Cara and her eyebrows worked it for Marc Jacobs during NYFW. She also spent 2013 vacationing with Rihanna, getting tattooed with Rita Ora, and swapping spit with Sienna Miller.