Demi Lovato joins X Factor USA judges on stage 27493
Demi Lovato joins X Factor USA judges on stage 27494
Demi Lovato joins X Factor USA judges on stage 27495
Demi Lovato joins X Factor USA judges on stage 27496
Demi Lovato joins X Factor USA judges on stage 27497
Demi Lovato joins X Factor USA judges on stage 27498
Demi Lovato joins X Factor USA judges on stage 27499
Demi Lovato joins X Factor USA judges on stage 27500