SG Wannabe

SG Wannabe or SG워너비 (the SG representing Simon and Garfunkel) is a popular South Korean Ballad trio that debuted in 2004 with their song, "Timeless". The group quickly became popular and the song, along with the music video, was played on cellular phones all over Korea[1], and their album topped the charts. Unlike other groups, SG Wannabe decided to abstain from promoting their music initially, declining to appear on music shows or in their own videos; the group has stated that they wish their audience will care more about the music, rather than the appearance.

http://en.wikipedia.org/wiki/SG_Wannabe

SG Wannabe- Timeless