Demi Lovato joins X Factor USA judges on stage 05493
Demi Lovato joins X Factor USA judges on stage 05494
Demi Lovato joins X Factor USA judges on stage 05495
Demi Lovato joins X Factor USA judges on stage 05496
Demi Lovato joins X Factor USA judges on stage 05497
Demi Lovato joins X Factor USA judges on stage 05498
Demi Lovato joins X Factor USA judges on stage 05499
Demi Lovato joins X Factor USA judges on stage 05500