Kim Jong-woon (born August 24, 1984), better known by his stage name Yesung, is a Korean pop singer and occasional actor. He is one of the four lead vocalists of the boy band Super Junior. He was once a radio host for his own radio program, M.I.R.A.C.L.E for You, which ended its broadcast in September 2007. His stage name Yesung (Hanja: 藝聲) is translated to "art-like voice" and is derived from the phrase "예술가의 성대", meaning "vocal chords of an artist."
On November 6, 2005, Yesung officially debuted on SBS's music program Popular Songs as a member of Super Junior 05, the first generation of Super Junior. The group performed their first single "TWINS (Knock Out)" with an audience of about 500 fans. A full studio album was released a month later, which debuted at #3 on the monthly MIAK K-pop album charts.
In March 2006, SM Entertainment began to recruit new members for the next Super Junior generation. However, plans changed and the company declared a halt in forming future Super Junior generations. The group dropped the suffix "05" and became officially credited as Super Junior.
The re-polished group hit big after they released their first CD single "U" the following summer, which became Super Junior's most successful single in the music charts until the release of "Sorry, Sorry" in March 2009. Sumber : Wikipedia