The night after their 2013 New Year's Eve show, Anderson Cooper and Kathy Griffin sit down to recap the best and most unexpected moments. On the list, Korean pop sensation Psy arriving unannounced with MC Hammer to crash the live broadcast in Times Square.
"He was pushed on by some Psy PR team...I don't think he knew where he was. I don't think he knew who we were. I don't think he realized he was on CNN," says Anderson, who is still baffled by the surprise visit.
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