Demi Lovato joins X Factor USA judges on stage 34537
Demi Lovato joins X Factor USA judges on stage 34538
Demi Lovato joins X Factor USA judges on stage 34539
Demi Lovato joins X Factor USA judges on stage 34540
Demi Lovato joins X Factor USA judges on stage 34541
Demi Lovato joins X Factor USA judges on stage 34542
Demi Lovato joins X Factor USA judges on stage 34543
Demi Lovato joins X Factor USA judges on stage 34544
Demi Lovato joins X Factor USA judges on stage 34545
Demi Lovato joins X Factor USA judges on stage 34546
Demi Lovato joins X Factor USA judges on stage 34547
Demi Lovato joins X Factor USA judges on stage 34548