Madonna "flipped out" in a New York nightclub when the DJ played a Britney Spears song, insiders have told the New York Post's Page Six column. Madonna, and current squeeze Jesus Luz, were attending her trainer Tracy Anderson's birthday party at The Ritz when the DJ played a Britney Spears track. "She flipped out, stormed upstairs, and spent the rest of the night aggressively making out with Jesus," a source (awesomely!) claims. "The pair later slipped out the back door and into an idling SUV."
