Rapper PSY’s worldwide smash "Gangnam Style” has been crowned song of the year by South Korea’s music industry association.The viral sensation that became an international chart-topper last year won the Digital Daesang honor at the 2013 Golden Disk Awards, considered South Korea’s version of the Grammys.PSY did not attend Wednesday night’s awards ceremony at Malaysia’s Sepang International Circuit."Gangnam Style” clinched the award that’s determined largely by downloads and ringtone sales. The song edged out contenders by acts including Big Bang, G-Dragon and T-ara.Agencies.