Choi Soo-young (Korean: 최수영), known mononymously as Sooyoung, is a South Korean singer, actress, and songwriter. 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, Choi 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 widely known girl groups worldwide. Apart from her group's activities, she has also starred in various television dramas.
In October 2017, Choi 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. In October 2024, Choi made her solo debut in Japan with released "Unstoppable" under Japan label Avex Trax.
