Demi Lovato joins X Factor USA judges on stage 31513
Demi Lovato joins X Factor USA judges on stage 31514
Demi Lovato joins X Factor USA judges on stage 31515
Demi Lovato joins X Factor USA judges on stage 31516
Demi Lovato joins X Factor USA judges on stage 31517
Demi Lovato joins X Factor USA judges on stage 31518
Demi Lovato joins X Factor USA judges on stage 31519
Demi Lovato joins X Factor USA judges on stage 31520
Demi Lovato joins X Factor USA judges on stage 31521
Demi Lovato joins X Factor USA judges on stage 31522
Demi Lovato joins X Factor USA judges on stage 31523
Demi Lovato joins X Factor USA judges on stage 31524