Demi Lovato joins X Factor USA judges on stage 21537
Demi Lovato joins X Factor USA judges on stage 21538
Demi Lovato joins X Factor USA judges on stage 21539
Demi Lovato joins X Factor USA judges on stage 21540
Demi Lovato joins X Factor USA judges on stage 21541
Demi Lovato joins X Factor USA judges on stage 21542
Demi Lovato joins X Factor USA judges on stage 21543
Demi Lovato joins X Factor USA judges on stage 21544
Demi Lovato joins X Factor USA judges on stage 21545
Demi Lovato joins X Factor USA judges on stage 21546
Demi Lovato joins X Factor USA judges on stage 21547
Demi Lovato joins X Factor USA judges on stage 21548