Demi Lovato joins X Factor USA judges on stage 08537
Demi Lovato joins X Factor USA judges on stage 08538
Demi Lovato joins X Factor USA judges on stage 08539
Demi Lovato joins X Factor USA judges on stage 08540
Demi Lovato joins X Factor USA judges on stage 08541
Demi Lovato joins X Factor USA judges on stage 08542
Demi Lovato joins X Factor USA judges on stage 08543
Demi Lovato joins X Factor USA judges on stage 08544
Demi Lovato joins X Factor USA judges on stage 08545
Demi Lovato joins X Factor USA judges on stage 08546
Demi Lovato joins X Factor USA judges on stage 08547
Demi Lovato joins X Factor USA judges on stage 08548