Psy's song "Gangnam Style" became a global phenomenon, topping the charts in countries around the world. The quirky dance moves and upbeat music of the song in Korean made it addictively catchy and easy for people worldwide to sing and dance along. In just a few weeks, Psy became an overnight international sensation, performing his "horse dance" from the viral music video on major US television shows and seeing countless people copying his bizarre dance style. "Gangnam Style" broke the Guinness World Record for the most popular YouTube video ever, cementing Psy's place in pop culture history and opening doors for other Korean artists' music in the US market.