Singer Psy took over the stage at the President's inauguration ceremony.

Today, Psy attended the 18th president's inauguration ceremony to perform a congratulatory performance of his hit songs, "Gangnam Style" and "Champion."

For this formal event, Psy dressed up in his black tuxedo and white sunglasses. His upbeat and energetic performance changed the overall serious mood of the ceremony.

Psy even made the audience laugh with his comical performance at a rather calm event.

Psy also yelled out, "Although this is a formal setting, please dance along to this song." The crowd then started to dance along with him.

His fun and powerful dance made it so that the President's inauguration was a successful one.

Many other artists such as JYJ, musical actors and comedians attended as well to celebrate the president's inauguration.