"Gangnam Style" is a single released by South Korean rapper Psy on July 15, 2012. It achieved widespread international recognition and became the most viewed YouTube video, becoming the first video to gain a billion views on December 21, 2012. "Gangnam Style"'s unprecedented worldwide popularity was acknowledged by YouTube, who called it a "massive" hit at a global level "unlike anything we've ever seen before" while Billboard noted that "Gangnam Style" was nothing short of a pop culture phenomenon. As a result, it has influenced worldwide popular culture in many aspects.