Sooyoung
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Choi Soo-young (born February 10, 1990), better known by the mononym Sooyoung, is a South Korean singer and actress. She was a part of the short-lived Korean-Japanese singing duo, Route θ, during 2002 in Japan. After returning to South Korea in 2004, Sooyoung eventually became a member of girl group Girls' Generation in 2007. The group went on to be one of the best-selling artists in South Korea and one of South Korea's most popular girl groups worldwide. Apart from her group's activities, Sooyoung has also starred in various television dramas such as The Third Hospital (2012), Dating Agency: Cyrano (2013), My Spring Days (2014), Squad 38 (2016) and Man in the Kitchen (2017–2018).

Sooyoung was born in Gwangju, Gyeonggi, South Korea, on February 10, 1990. She is the younger sister of Choi Soo-jin, who is a musical theatre actress. Sooyoung was initially discovered through an SM Entertainment Open Audition when she was in fifth grade. She later won first place at the 2002 Korea-Japan Ultra Idol Duo Audition and debuted in Japan as a member of the group Route θ. The group released three singles before disbanding in 2003. Sooyoung returned to SM Entertainment and eventually debuted in South Korea as a member of the girl group Girls' Generation in August 2007. The group gained significant popularity with the release of their hit single "Gee" in 2009. Sooyoung has said in an interview that she was also interested in acting before debuting as a singer and had failed more than 70 auditions during her pre-debut days.