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Madonna‘s Madison Square Garden MDNA Tour concert last night got an unexpected surprise by way of Seoul: While Madonna was performing her song “Give It 2 Me,” K-pop superstar PSY launched out of a trapdoor in the stage and joined her in a rousing rendition of “Gangnam Style.” Clad in a sharp red suit (good to see he’s not deviating from brights!), PSY, Madonna and her dancers all giddy-up’d the Gangnam way. If only they’d had the good sense to add Ryan Gosling and some yawning pandas, the performance would have actually broken the Internet. Even as it is, it’ll probably go viral.Fans at