Psy is so successful because he's good fun.

The South Korean rapper's music manager Scooter Braun thinks - who is also partly responsible for Justin Bieber's stratospheric rise to fame - believes the "Gangnam Style" hitmaker has become a global sensation despite not singing in English because of the hilarity of his dance moves.

"People love to watch that guy dance. It makes people have fun, and I think music should be a release," he said.

Psy's second international release, "Gentleman," has racked up 224 million views since April 13, which Scooter - who signed the rapper to his label School Boy Records last year - believes could catch up to his 1.5 billion views for "Gangnam Style" if he keeps making people laugh: "It went like Number One [in the video chart] in, like, 52 countries, so it was kind of mind-blowing for us. But he's just fun. And I think he's coming to the US at the end of this week to start performing it on TV, and around the world. And he represents having a good time, so good for him."