Demi Lovato joins X Factor USA judges on stage 00525
Demi Lovato joins X Factor USA judges on stage 00526
Demi Lovato joins X Factor USA judges on stage 00527
Demi Lovato joins X Factor USA judges on stage 00528
Demi Lovato joins X Factor USA judges on stage 00529
Demi Lovato joins X Factor USA judges on stage 00530
Demi Lovato joins X Factor USA judges on stage 00531
Demi Lovato joins X Factor USA judges on stage 00532
Demi Lovato joins X Factor USA judges on stage 00533
Demi Lovato joins X Factor USA judges on stage 00534
Demi Lovato joins X Factor USA judges on stage 00535
Demi Lovato joins X Factor USA judges on stage 00536