Demi Lovato joins X Factor USA judges on stage 02537
Demi Lovato joins X Factor USA judges on stage 02538
Demi Lovato joins X Factor USA judges on stage 02539
Demi Lovato joins X Factor USA judges on stage 02540
Demi Lovato joins X Factor USA judges on stage 02541
Demi Lovato joins X Factor USA judges on stage 02542
Demi Lovato joins X Factor USA judges on stage 02543
Demi Lovato joins X Factor USA judges on stage 02544
Demi Lovato joins X Factor USA judges on stage 02545
Demi Lovato joins X Factor USA judges on stage 02546
Demi Lovato joins X Factor USA judges on stage 02547
Demi Lovato joins X Factor USA judges on stage 02548