Demi Lovato joins X Factor USA judges on stage 13493
Demi Lovato joins X Factor USA judges on stage 13494
Demi Lovato joins X Factor USA judges on stage 13495
Demi Lovato joins X Factor USA judges on stage 13496
Demi Lovato joins X Factor USA judges on stage 13497
Demi Lovato joins X Factor USA judges on stage 13498
Demi Lovato joins X Factor USA judges on stage 13499
Demi Lovato joins X Factor USA judges on stage 13500