Psy has been a star in his native South Korea for over a decade, but thanks to a viral video and a VMA cameo appearance, he’s now an international sensation. His clever clip for ‘Gangnam Style’, showcasing his quirky dance moves and sense of humour, has gotten more than 120 million YouTube videos—and caught the attention of Scooter Braun, manager of Justin Bieber, who recently signed Psy to his label and declared plans to make him the first Korean musician to cross over to U.S. superstardom.