United Nations Secretary General Ban Ki-Moon joined South Korean rap phenomenon Psy in his trademark “Gangnam Style” dance moves Tuesday at U.N. headquarters.

Speaking to reporters, Mr. Ban said he was “a bit jealous” of his countryman, lamenting that Psy's meteoric rise to global popularity means he is no longer “the most famous Korean in the world.”

The usually serious Mr. Ban loosened up and allowed Psy to teach him some of the dance moves popularized by the music video for “Gangnam Style,” which has been viewed more than 530 million times on YouTube.

The U.N. secretary general joked that he thought Psy was so cool that he may be able to help end global warming. The 34-year-old artist, whose real name is Park Jae-Sang, returned the praise, saying “now you have the first and second famous Korean in the same building.