Demi Lovato joins X Factor USA judges on stage 16493
Demi Lovato joins X Factor USA judges on stage 16494
Demi Lovato joins X Factor USA judges on stage 16495
Demi Lovato joins X Factor USA judges on stage 16496
Demi Lovato joins X Factor USA judges on stage 16497
Demi Lovato joins X Factor USA judges on stage 16498
Demi Lovato joins X Factor USA judges on stage 16499
Demi Lovato joins X Factor USA judges on stage 16500