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"Simon Cowell has reportedly teased that &amp;quot;one of the most famous singers in the world&amp;quot; has enquired about the possibility of joining The X Factor USA. The music mogul told Extra&amp;#039;s Terri Seymour that the production team had been contacted by the mystery celebrity over the weekend, but declined to reveal their identity. He would only say that the individual was &amp;quot;someone very well known who out of the blue wanted to be a judge on the show... and it&amp;#039;s one of the most famous singers in the world&amp;quot;. Cowell previously insisted that nobody has been booked yet for the Fox competition&amp;#039;s judging panel except him, following speculation that UK X Factor judge Cheryl Cole, Pussycat Doll Nicole Scherzinger and Katy Perry were in the running. Other stars who have been linked to the series include Mariah Carey, while Kylie Minogue has said she would be interested in appearing as a guest mentor. The X Factor will premiere on Fox in 2011.  "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/the-x-factor-us/news/a283630/cowell-teases-x-factor-usa-judge-interest/>