Demi Lovato joins X Factor USA judges on stage 27921
Demi Lovato joins X Factor USA judges on stage 27922
Demi Lovato joins X Factor USA judges on stage 27923
Demi Lovato joins X Factor USA judges on stage 27924
Demi Lovato joins X Factor USA judges on stage 27925
Demi Lovato joins X Factor USA judges on stage 27926
Demi Lovato joins X Factor USA judges on stage 27927
Demi Lovato joins X Factor USA judges on stage 27928
Demi Lovato joins X Factor USA judges on stage 27929
Demi Lovato joins X Factor USA judges on stage 27930
Demi Lovato joins X Factor USA judges on stage 27931
Demi Lovato joins X Factor USA judges on stage 27932