Simon Cowell is pulling out the big guns for the UK edition of "The X Factor." Cowell is rumored to be securing Beyonce to perform a duet on the season finale of "The X Factor." Cowell is reportedly so confident that a16-year-old contestant, Ella Henderson, will make it the final three round, that he is wrangling the "Love on Top" singer to help attract several million more viewers and to increase her chances of winning.