Psy explains his name to the BBC
Gangnam Style, by the Korean pop star Psy, is officially the world's most watched video on YouTube with nearly 900 million views.
In Singapore, as part of a whirlwind tour, 34-year-old Psy met the BBC's Rico Hizon.
He told him that his success is still strange, and that the Gangnam song was inspired by Western music.
Psy is short for psycho, according to the artist, and Rico started off by asking him why he chose such a name.