Beyonce Knowles will appear in the X Factor finale for a duet with one of the show favorites, according to online reports. The 27-year-old singer is said to be negotiating with Cowell to be a special guest at the final show in December. An insider tells the Daily Star, "Simon wants to end the series on a high with two of the world's biggest pop acts." "Last year we had Kylie and Katherine Jenkins performing duets with Leon and Rhydian and this year we want Beyonce and Take That. It'll be the hottest ticket in town," the insider added.
