Demi Lovato joins X Factor USA judges on stage 07994
Demi Lovato joins X Factor USA judges on stage 07995
Demi Lovato joins X Factor USA judges on stage 07996
Demi Lovato joins X Factor USA judges on stage 07997
Demi Lovato joins X Factor USA judges on stage 07998
Demi Lovato joins X Factor USA judges on stage 07999
Demi Lovato joins X Factor USA judges on stage 08000