Madonna’s MDNA World Tour made it’s way to New York this week and during her second show at Madison Square Garden, she brought out a special guest. The Material Girl was joined by Korean pop star PSY as they performed a mashup of his hit song “Gangnam Style” and “Music.” After their performance, Madonna told the crowd that PSY flew “all the way from Frankfurt, Germany this morning just to cheer your a**es up!”

Madonna has a few more North American tour dates including Charlotte, Atlanta, and two shows in Miami. On November 24th she begins the South American portion of the tour.

Click the photo above to see photos of Madonna’s stop in Detroit