Demi Lovato joins X Factor USA judges on stage 03493
Demi Lovato joins X Factor USA judges on stage 03494
Demi Lovato joins X Factor USA judges on stage 03495
Demi Lovato joins X Factor USA judges on stage 03496
Demi Lovato joins X Factor USA judges on stage 03497
Demi Lovato joins X Factor USA judges on stage 03498
Demi Lovato joins X Factor USA judges on stage 03499
Demi Lovato joins X Factor USA judges on stage 03500