Oppa #GangnamStyle! #Kpop rapper #Psy shook up the world when he released "Gangnam Style" 10 years ago today. The dance track was a massive hit in South Korea and took over the world, reaching No. 2 on the @billboard #Hot100. His video also became a phenomenon, with his dancing inspiring countless parodies and dance-alongs. It would go on to become the first video on #YouTube to reach 1 billion views.