Demi Lovato joins X Factor USA judges on stage 27945
Demi Lovato joins X Factor USA judges on stage 27946
Demi Lovato joins X Factor USA judges on stage 27947
Demi Lovato joins X Factor USA judges on stage 27948
Demi Lovato joins X Factor USA judges on stage 27949
Demi Lovato joins X Factor USA judges on stage 27950
Demi Lovato joins X Factor USA judges on stage 27951
Demi Lovato joins X Factor USA judges on stage 27952
Demi Lovato joins X Factor USA judges on stage 27953
Demi Lovato joins X Factor USA judges on stage 27954
Demi Lovato joins X Factor USA judges on stage 27955
Demi Lovato joins X Factor USA judges on stage 27956