SS501 (Hangul: 더블에스오공일, pronounced as Double-S 501) is a popular South Korean boyband under management of DSP Media. The group consists of five members: Kim Hyunjoong (김현중), Heo Youngsaeng (허영생), Kim Kyujong (김규종), Park Jungmin (박정민) and Kim Hyungjun (김형준). They have made their mark all across Asia, specifically enjoying high popularity in Japan and their homeland.
They debuted in June 2005 with their first single "경고 (Warning)", recieving a lot of positive feedback even before its release. They followed up in late 2005 with their second single titled "Snow Prince" that thrust them into national and international success. Since then, SS501 has transformed themselves into more than just an average boyband; the group between all members have worked in various fields in the entertainment industry. SS501 has participated as whole or individually in many CFs (commercials), TV Dramas, Variety shows, as well as handling various MC jobs in a variety of popular shows, DJing and VJing also is something familiar to many of the members.Their success in other fields of the industry does not stop there; their unique voices attracted some to the point in which they were casted as voiceovers for an animated movie. Members such as Park Jungmin and Hyunjoong have been chosen as lead actors in a major musical 'Grease' and a popular Drama entitled 'Boys Over Flowers' in late 2008; a drama famous for its previous Taiwanese and Japanese counterparts.