https://www.youtube.com/watch?v=GiOZsj3ZicQ The twisted sisters are no more. Cristina Yang left Grey Sloan Memorial Hospital and best friend Meredith Grey to fulfill her potential in Switzerland on the “Grey’s Anatomy” season finale Thursday. Why do we love Cristina Yang? Well I think Cosmopolitan said it best: “She’s one of the first characters on television to prove […]