Madonna invited Korean pop star PSY to perform his smash single during

Madonna invited Korean pop star PSY to perform his smash single during her concert at New York City’s Madison Square Garden Nov. 13. After mimicking the dance’s signature choreography, Madonna and PSY then danced to her 2000 hit “Music” in front of nearly 20,000 audience members.

The night wasn’t all fun and games, however, as Madonna also helped raise money for victims of Hurricane Sandy. While performing her 1984 classic “Like a Virgin,” the singer asked fans to donate funds for relief efforts.