Demi Lovato joins X Factor USA judges on stage 18493
Demi Lovato joins X Factor USA judges on stage 18494
Demi Lovato joins X Factor USA judges on stage 18495
Demi Lovato joins X Factor USA judges on stage 18496
Demi Lovato joins X Factor USA judges on stage 18497
Demi Lovato joins X Factor USA judges on stage 18498
Demi Lovato joins X Factor USA judges on stage 18499
Demi Lovato joins X Factor USA judges on stage 18500