Kim Wan-sun (Hangul: 김완선, Hanja: 金緩宣; born May 16, 1969) is a South Korean pop singer who was known in the mid-1980s and early 1990s as the "Korean Madonna" and "the dancing queen of Korean popular music's renaissance era" as well as a sex symbol for her "sexy" dancing and "charismatic" stage presence.

She is a K-Pop pioneer who gained international recognition with the song 【Day By Day 삐에로는 우릴보고 웃지】 covered by Jackie Moore / Dora Carofiglio and her 3 Mandopop albums released in Taiwan.