Demi Lovato joins X Factor USA judges on stage 31993
Demi Lovato joins X Factor USA judges on stage 31994
Demi Lovato joins X Factor USA judges on stage 31995
Demi Lovato joins X Factor USA judges on stage 31996
Demi Lovato joins X Factor USA judges on stage 31997
Demi Lovato joins X Factor USA judges on stage 31998
Demi Lovato joins X Factor USA judges on stage 31999
Demi Lovato joins X Factor USA judges on stage 32000