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Choi Soo-young (born February 10, 1990), professionally known as Sooyoung, is a South Korean singer, songwriter and actress. She was a member of the short-lived Korean-Japanese singing duo Route 0 during 2002 in Japan. After returning to South Korea in 2004, Sooyoung eventually became a member of girl group Girls' Generation in 2007, which went on to become 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). In October 2017, Sooyoung left SM Entertainment although she remains as a member of Girls' Generation. She joined Echo Global Group and released her first solo single "Winter Breath" in 2018, before moving to Saram Entertainment in 2019.