Singer Psy performs as fans hold up his music CDs during his concert in Seoul August 11, 2012. The chubby, rapping singer with slicked-back hair and a tacky suit is the latest musical sensation to burst upon the world from South Korea, via a YouTube music video that has been seen by over 20 million people in under a month. In a nation famed for the pretty-boy but often bland bands of K-Pop, nobody was more surprised by the success of the video "Gangnam Style" than its creator, Psy, a musician with a decade-long career in his homeland who never thought to break overseas. Picture taken August 11, 2012. To match story KOREA-UNCOOL/ REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: ENTERTAINMENT SOCIETY)