Leessang is a South Korean Hip-hop duo, composed of Kang Hee-gun and Gil Seong-joon. Formed in 2002, Leessang has produced 8 albums with at least one #1 hit in each. However, it is their last three albums, Hexagonal, Asura Balbalta, and Unplugged that broke numerous records and guided their entry to the mainstream Korean music industry. All the songs in the albums entered the top positions on all major and minor charts upon release and held its position for at least three days, achieving a very rare "all kill".
Their first single for 2013, Tears, a collaboration with Duble Sidekick ft. Yoojin of The SEEYA, also became the first Perfect All-Kill for 2013 despite the lack of promotion by either LeeSsang or Duble Sidekick.
Leessang is composed of one vocalist and one rapper. The duo has released eight albums to date: two self-titled records in 2002 and 2003, Library of Soul in 2005, Black Sun in 2007, Baek-a Jeolhyeon in 2009, Hexagonal in late 2009, Asura Balbalta in 2011 and Unplugged in 2012.