Korean viral sensation Psy fetes “Gangnam Style” with half-naked live concert

Published On: Oct 04 2012 05:16:20 PM EDT   Updated On: Oct 04 2012 02:38:47 PM EDT

Psy, the South Korean rapper whose song "Gangnam Style" stormed the charts and exploded onto YouTube like few others before it, rewarded fans with a free concert in Seoul that streamed live over Ustream.