Demi Lovato joins X Factor USA judges on stage 19493
Demi Lovato joins X Factor USA judges on stage 19494
Demi Lovato joins X Factor USA judges on stage 19495
Demi Lovato joins X Factor USA judges on stage 19496
Demi Lovato joins X Factor USA judges on stage 19497
Demi Lovato joins X Factor USA judges on stage 19498
Demi Lovato joins X Factor USA judges on stage 19499
Demi Lovato joins X Factor USA judges on stage 19500