Barbie Hsu (Chinese: 徐熙媛), also known as Dà S (Chinese: 大S), is a Taiwanese actress and singer born on 6 October 1976. She is the older sister of Dee Hsu. She is best known for her role as Shan Cai in Taiwanese drama Meteor Garden, an adaptation of the Japanese manga Hana Yori Dango and Mars with Vic Chou of F4. She has also acted in movies, her first being the Chinese movie The Ghost Inside. She also had a singing career prior to her acting career. She was in a duo group called "S.O.S." (Sisters of Shu) with her sister Dee Hsu. Their last album was called Abnormal Girls. Due to the nature of the term S.O.S, they changed their group name to ASOS (A Sisters of Shu).