X Factor: Beyonce for everybody as L.A. Reid's Guest Mentor

X Factor, Beyonce and L.A. Reid Beyonce will be the "Only Girl (In the world)" when she mentors the boys group round the X Factor. The "Umbrella" singer, 23, will be the guest mentor for judge L.A. Reid's group through the Judges' Houses round in the competition. Throughout this round, each judge takes their group for his or her home or possibly an area from the choosing to make use of the participants around the more intimate level also to also bring another mentor to assist them out. Mariah Carey to mentor X Factor entertainers ... from Simon Cowell's crib? We now have spent utilizing their judge and guest mentor, each contestant must then perform to prove why they must be selected for judge's final category. Although it has been reported that Mariah Carey assists as Simon Cowell's guest mentor, another three guest mentors won't be formally revealed until Wednesday's show. The X Factor airs Wednesdays and Thursdays at 8/7c on Fox. Cure you think needs to be a guest mentor for your participants?