Demi Lovato joins X Factor USA judges on stage 27549
Demi Lovato joins X Factor USA judges on stage 27550
Demi Lovato joins X Factor USA judges on stage 27551
Demi Lovato joins X Factor USA judges on stage 27552
Demi Lovato joins X Factor USA judges on stage 27553
Demi Lovato joins X Factor USA judges on stage 27554
Demi Lovato joins X Factor USA judges on stage 27555
Demi Lovato joins X Factor USA judges on stage 27556
Demi Lovato joins X Factor USA judges on stage 27557
Demi Lovato joins X Factor USA judges on stage 27558
Demi Lovato joins X Factor USA judges on stage 27559
Demi Lovato joins X Factor USA judges on stage 27560