Demi Lovato joins X Factor USA judges on stage 07493
Demi Lovato joins X Factor USA judges on stage 07494
Demi Lovato joins X Factor USA judges on stage 07495
Demi Lovato joins X Factor USA judges on stage 07496
Demi Lovato joins X Factor USA judges on stage 07497
Demi Lovato joins X Factor USA judges on stage 07498
Demi Lovato joins X Factor USA judges on stage 07499
Demi Lovato joins X Factor USA judges on stage 07500