Howard Stern Has A Bag Of Jokes For Britney Spears! She's A Train Wreck (DETAILS)

It's The X Factor vs. America's Got Talent!

Britney Spears, who closed a reported $16 million deal to judge on The X Factor, was the punching bags for all of Howard Sterns jokes!

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During a NYC press conference promoting America's Got Talent, the 58-year-old said Britney "still thinks the earth is flat!"

The blunt Sirius XM Radio host believes people will only watch the show that was created by ex-American Idol judge Simon Cowell to "see what kind of train wreck she is."

The pop singer has sold well over a 100 million albums worldwide, that's not enough to prove her credibility as a judge?

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He goes on to say:

"I think we're going to tune into to see her, to see if she can function through the thing. As far as any real criticism, I think Simon Cowell and L.A. Reid will do that ...I think Britney will sit there and eat a lollipop and wear a sexy outfit."

We can only hope the Baby One More Time singer proves him wrong when the premier of The X Factor this fall!