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Hwang Chan-sung ( born February 11, 1990), also known mononymously as Chansung, is a South Korean singer, rapper, songwriter and actor. He is a member of the Korean boy band 2PM. He made his debut as an actor in the 2006 comedy series Unstoppable High Kick, and since then has gone on to star in the Japanese drama Kaitō Royale (2011) and 7th Grade Civil Servant (2013). Wikipedia