1. 'Gangnam Style' Leads YouTube's Top Trending Videos of 2012

    December 18, 2012 2:00 PM EST   While browsing videos on YouTube the past day you may have noticed that the site's icon in the upper lefthand corner has been taken over by a .gif of PSY and his all too familiar dance. Following this link reveals "YouTube in Rewind 2012," a playlist featuring the year's…