Demi Lovato joins X Factor USA judges on stage 01493
Demi Lovato joins X Factor USA judges on stage 01494
Demi Lovato joins X Factor USA judges on stage 01495
Demi Lovato joins X Factor USA judges on stage 01496
Demi Lovato joins X Factor USA judges on stage 01497
Demi Lovato joins X Factor USA judges on stage 01498
Demi Lovato joins X Factor USA judges on stage 01499
Demi Lovato joins X Factor USA judges on stage 01500