Simon Cowell's favorite 'American Idol' moment: Fantasia singing 'Summertime'
Favorite moment: "Fantasia singing 'Summertime.'"
Least favorite moment: "I think it was Clay Aiken singing 'Grease' ... with the red leather jacket. I think that was a low point."
What about Paula coming to "X Factor" now that she's signed on to go "Got to Dance" for CBS: "I don't know. I sent Paula a note because I knew that this was likely to happen. I sent her a note just saying that I was actually pleased somebody's built a show around her, it just proves her star power. Paula's a survivor. She's much smarter than people know. But what I said, and I literally mean this, I would welcome her on any of my shows any time."
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Photo credit: FOX