"Lee ChangSun (Joon), born Lee Chang-sun, was born on February 7, 1988 in Seoul, South Korea. He is a Korean singer, actor, and a former member of the boy idol group MBLAQ. In 2009, he dropped out of Korea National University of Arts due to the filming of ""Ninja Assassin"". On October 15, 2009, he officially debuted with the boy group MBLAQ, serving as the lead singer, visual, and choreographer.; On November 25th, he starred in the Hollywood film ""Ninja Assassin"". In September 2010, he starred in the MBC Sunday drama special ""Housewife Kim Kwang Ja’s 3rd Activities"".; On November 4th, he starred in the KBS Wednesday and Thursday drama ""Jungle Fish 2"". In February 2012, he starred in the KBS weekday drama ""Sent from Heaven"". In February 2013, he starred in the KBS Wednesday and Thursday drama ""IRIS II: New Generation"".; On October 24th, he starred in the Korean film ""Rough Play"" and was nominated for Best New Actor (Film) Award at the 50th Baeksang Arts Awards. In April 2014, he starred in the tvN Friday and Saturday drama ""Gap-dong"".; In November, he starred in the MBC Wednesday and Thursday drama ""Mr. Back"". His contract expired in October 2014 and he chose not to renew his contract and left the group MBLAQ. In February 2015, he starred in the SBS Monday and Tuesday drama ""Heard It Through the Grapevine"". On December 19, 2019, he was discharged from the army and returned as a radio DJ."