Stage Name: Shoo 슈

| Real Name: Yoo Soo Young (유수영)
| Nicknames: Donkey, Dragonfly
| Birthday: October 23, 1981
| Birthplace: Yokohama, Japan
| Height: 160 cm
| Weight: 44 kg
| Blood type: A
| Hobbies: Swimming
| Religion: Atheist

Yoo Soo-Young (born October 23, 1981, Yokohama, Japan), more commonly known as Shoo (her Japanese name), is a Korean singer, actor, and a member of the pop group S.E.S.. Although Korean, she lived in Japan for most of her early life. She got her start in the group by trying out in auditions for SM Entertainment (unlike the other two members, who were discovered through less conventional methods). She succeeded in getting noticed from the judges and was thus offered a spot in their girl group, which became known as S.E.S. (standing for Sea, Eugene, and Shoo, the three members).