Madonna performed ‘Gangnam Style’ with Psy at a concert last night (November 13). The singer was joined by the Korean star during her show at New York’s Madison Square Gardens. Madonna said: “Because you’ve been working so hard on smashing your egos I have a little surprise for you. “A song I haven’t sung for a while. You’re gonna have to help me out with everything. I’m tired, I’ve been doing this for a year!” She then mashed up her own song ‘Give it 2 Me’ with ‘Gangnam Style’, before Psy entered the stage for the track’s famous dance routine. The US leg of Madonna’s ‘MDNA’ tour wraps up later this month.