Choi Seong Hyeok, formerly known as Woo Sung, is a South Korean singer, dancer and previously a member of Snuper (스누퍼). He graduated from the acting program at the Seoul Institute of the Arts and made his debut in 2015 as Snuper's lead vocalist with their first EP "Shall We." He enlisted on January 26, 2021 and was discharged on July 25, 2022. After the group went into an indefinite hiatus in early 2020 when some of the members began enlisting in the military, Widmay Entertainment (위드메이) announced Snuper's disbandment in May 2023 when all members decided not to renew their contracts.

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