Demi Lovato joins X Factor USA judges on stage 28493
Demi Lovato joins X Factor USA judges on stage 28494
Demi Lovato joins X Factor USA judges on stage 28495
Demi Lovato joins X Factor USA judges on stage 28496
Demi Lovato joins X Factor USA judges on stage 28497
Demi Lovato joins X Factor USA judges on stage 28498
Demi Lovato joins X Factor USA judges on stage 28499
Demi Lovato joins X Factor USA judges on stage 28500