Demi Lovato joins X Factor USA judges on stage 20493
Demi Lovato joins X Factor USA judges on stage 20494
Demi Lovato joins X Factor USA judges on stage 20495
Demi Lovato joins X Factor USA judges on stage 20496
Demi Lovato joins X Factor USA judges on stage 20497
Demi Lovato joins X Factor USA judges on stage 20498
Demi Lovato joins X Factor USA judges on stage 20499
Demi Lovato joins X Factor USA judges on stage 20500