Simpson is the latest star said to be in considerations for a role on the programme, but she's moved swiftly to deny the speculation, reports the Daily Express.
In a post on her Twitter.com page, she writes, "Just to clear up a rumor... I am NOT going to judge X Factor!!! I don't even know where that info came from."
Other stars who have also been linked to the judging roles in the show include Katy Perry and Kelly Rowland. Meanwhile Will Smith has denied reports he's signed up for the show. (ANI)