Howard Stern Cracks on Britney Spears As 'X-Factor' Judge: 'She Still Thinks the Earth is Flat'

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Even as he earnestly promised to be a fair and family-friendly judge on America's Got Talent, Howard Stern couldn't help but go off the cuff when tempted by a question about a new rival.

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Speaking at a press conference at New York's Friars Club on Thurday, Stern was asked about Britney Spears' rumored new contract with The X-Factor.

"I think it’s a wonderful decision. Britney still thinks the earth is flat," Stern joked. "I can't imagine… I think we’re going to tune in to see her, to see if she can function through the thing. As far as any real criticism, I think Simon [Cowell] and LA Reid will do that. As far as criticism, I think Britney will sit there and eat a lollipop and wear a sexy outfit… I'll tune in to see what kind of train wreck she is, absolutely."