The UN chief joked during the meeting on Tuesday that he felt overshadowed by the Gangnam Style star.
His video has scored over half a billion views on YouTube, making him a worldwide overnight sensation.
Psy and Ban Ki-moon lavished praise on each other, with Ban even risking a few of Psy's trademark dance moves from the viral smash video "Gangnam Style."
It was a break from the conflict and wars the UN chief usually deals with – something that he evidently enjoyed.
Ban's spokesman, Martin Nesirky, told reporters the Secretary-General thinks it's important to engage different parts of society.