Demi Lovato joins X Factor USA judges on stage 34525
Demi Lovato joins X Factor USA judges on stage 34526
Demi Lovato joins X Factor USA judges on stage 34527
Demi Lovato joins X Factor USA judges on stage 34528
Demi Lovato joins X Factor USA judges on stage 34529
Demi Lovato joins X Factor USA judges on stage 34530
Demi Lovato joins X Factor USA judges on stage 34531
Demi Lovato joins X Factor USA judges on stage 34532
Demi Lovato joins X Factor USA judges on stage 34533
Demi Lovato joins X Factor USA judges on stage 34534
Demi Lovato joins X Factor USA judges on stage 34535
Demi Lovato joins X Factor USA judges on stage 34536