Britney Spears usually knows all the best pop dance moves, but when it came to "Gangnam Style," she needed some instruction.
Fortunately, Ellen DeGeneres surprised the new X Factor judge Monday with a personal lesson from Korean rapper and Internet sensation PSY.
Simon Cowell opted not to join in the dancing lesson, but Britney and Ellen were quite eager for a "Gangnam Style" tutorial. "You have to take your shoes off," Ellen told Britney, at first, pointing to her high-heeled nude pumps. "You're not going to be able to dance like that."