Demi Lovato joins X Factor USA judges on stage 05537
Demi Lovato joins X Factor USA judges on stage 05538
Demi Lovato joins X Factor USA judges on stage 05539
Demi Lovato joins X Factor USA judges on stage 05540
Demi Lovato joins X Factor USA judges on stage 05541
Demi Lovato joins X Factor USA judges on stage 05542
Demi Lovato joins X Factor USA judges on stage 05543
Demi Lovato joins X Factor USA judges on stage 05544
Demi Lovato joins X Factor USA judges on stage 05545
Demi Lovato joins X Factor USA judges on stage 05546
Demi Lovato joins X Factor USA judges on stage 05547
Demi Lovato joins X Factor USA judges on stage 05548