NEW YORK (ES)MADONNA performed with Psy in New York. The ‘Girl Gone Wild’ singer - who is currently on her worldwide ‘MDNA Tour’ - unveiled the South Korean pop sensation as her special guest at the concert at the city’s Madison Square Garden, where they performed a mash-up of her song ‘Give It To Me’ and his cult smash ‘Gangnam Style’. Madonna even performed Psy’s ‘horse’ dance - copied by stars including Mel B and Heidi Klum - and at one point crawled between his legs.