Demi Lovato joins X Factor USA judges on stage 21513
Demi Lovato joins X Factor USA judges on stage 21514
Demi Lovato joins X Factor USA judges on stage 21515
Demi Lovato joins X Factor USA judges on stage 21516
Demi Lovato joins X Factor USA judges on stage 21517
Demi Lovato joins X Factor USA judges on stage 21518
Demi Lovato joins X Factor USA judges on stage 21519
Demi Lovato joins X Factor USA judges on stage 21520
Demi Lovato joins X Factor USA judges on stage 21521
Demi Lovato joins X Factor USA judges on stage 21522
Demi Lovato joins X Factor USA judges on stage 21523
Demi Lovato joins X Factor USA judges on stage 21524