Demi Lovato joins X Factor USA judges on stage 13537
Demi Lovato joins X Factor USA judges on stage 13538
Demi Lovato joins X Factor USA judges on stage 13539
Demi Lovato joins X Factor USA judges on stage 13540
Demi Lovato joins X Factor USA judges on stage 13541
Demi Lovato joins X Factor USA judges on stage 13542
Demi Lovato joins X Factor USA judges on stage 13543
Demi Lovato joins X Factor USA judges on stage 13544
Demi Lovato joins X Factor USA judges on stage 13545
Demi Lovato joins X Factor USA judges on stage 13546
Demi Lovato joins X Factor USA judges on stage 13547
Demi Lovato joins X Factor USA judges on stage 13548