Demi Lovato joins X Factor USA judges on stage 10494
Demi Lovato joins X Factor USA judges on stage 10495
Demi Lovato joins X Factor USA judges on stage 10496
Demi Lovato joins X Factor USA judges on stage 10497
Demi Lovato joins X Factor USA judges on stage 10498
Demi Lovato joins X Factor USA judges on stage 10499
Demi Lovato joins X Factor USA judges on stage 10500
Demi Lovato joins X Factor USA judges on stage 10501