For the people who are
out of the loop, she's been replaced by Nicole Scherzinger. They already started filming Cheryl when she was casted as an official judge but for only two days, so they'll probably edit her as a guest judge.
I knew it was too good to be true. I was shocked to hear them cast her as a judge with such a big production and take that risk since she's unknown to the U.S market. Also L.A Reid has been reported to be really, really harsh and worse than Simon, so I'm not surprised if he somewhat influenced production to get what he wanted.
("When was the last time you performed? Eighteen years ago?" Reid asked. "Whatever made you stop then, you should've stuck with that decision.")
WHY?!