Demi Lovato joins X Factor USA judges on stage 00513
Demi Lovato joins X Factor USA judges on stage 00514
Demi Lovato joins X Factor USA judges on stage 00515
Demi Lovato joins X Factor USA judges on stage 00516
Demi Lovato joins X Factor USA judges on stage 00517
Demi Lovato joins X Factor USA judges on stage 00518
Demi Lovato joins X Factor USA judges on stage 00519
Demi Lovato joins X Factor USA judges on stage 00520
Demi Lovato joins X Factor USA judges on stage 00521
Demi Lovato joins X Factor USA judges on stage 00522
Demi Lovato joins X Factor USA judges on stage 00523
Demi Lovato joins X Factor USA judges on stage 00524