Choi Soo-young (born February 10, 1990) most often credited as Sooyoung, is a South Korean singer and actress. She was a member of Korean-Japanese duo Route θ and is a member of South Korean girl group Girls' Generation.Sooyoung has also participated in various television dramas such as The 3rd Hospital (2012), Dating Agency: Cyrano (2013), and My Spring Days (2014).