Demi Lovato joins X Factor USA judges on stage 04494
Demi Lovato joins X Factor USA judges on stage 04495
Demi Lovato joins X Factor USA judges on stage 04496
Demi Lovato joins X Factor USA judges on stage 04497
Demi Lovato joins X Factor USA judges on stage 04498
Demi Lovato joins X Factor USA judges on stage 04499
Demi Lovato joins X Factor USA judges on stage 04500
Demi Lovato joins X Factor USA judges on stage 04501