Jang Su Won (born July 16, 1980) is a former vocalist from the group Sechs Kies and a duet singer along with former Sechs Kies member Kim Jae Duc under Kiss Entertainment.
SechsKies took home several end of the year awards, including the KMTV Korean Music Awards Bonsang Award, SBS Music Awards Bonsang Award, and Golden Disk Awards Bonsang Award.
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Sechs Kies or 6kies (Korean: 젝스키스) is a South Korean male idol pop group popular in the late 1990s formed under Daesung Entertainment.