Ever on-trend, Madonna racked-up a mother-load of cool points last night when she invited one of the biggest pop sensations in the world — and certainly The Biggest, if we’re talking Internet sensations — to join her on stage at New York’s Madison Square Garden. “I have a little surprise for you,” she told the crowd, explaining that she’s tired after a year on tour and that she might need help with the next song. And with that, she invited Psy out to the stage for a little “Give It To Me”/”Gangnam Style” mash-up action. Madge told the crowd that she had flown the K-Pop superstar “all the way from Frankfurt, Germany,” that morning, and aren’t we all glad? Because there was a whole lot of giddy-up Gangnam style dancing, and then something we will never forget: Psy climbed through Madge’s legs, and with a big old smile on her face, she proceeded to pretended ride him like a pony. Forget the nip slips and protests the MDNA Tour has been wrought by, this is exactly the sort of fun the Queen of Pop should be having.