John-Hoon, better know as Kim Jung Hoon, is a Korean singer. He was a part of the duo UN before it disbanded in 2005. Currently, he is a solo singer and actor. The latest successful drama that he played was 궁 (Goong). His debut mini-album in Japan, "5 Stella Lights," was released on 25 October 2006 under Pony Canyon company; for that album, he named himself John-Hoon.