Excerpt: If Simon Cowell gets his way, Britney Spears could be the next guest star on American Idol.
The British producer raved about the singer after she performed on his British talent show X Factor.
"Of all the artists I have ever had on any of these shows, there was more buzz, more excitement for this girl [than anyone else]," Cowell told Ryan Seacrest on his KIIS-FM radio show. "It was as if the president was on the show. I love it. I think if you're going to be a star, be a star."