Demi Lovato joins X Factor USA judges on stage 18993
Demi Lovato joins X Factor USA judges on stage 18994
Demi Lovato joins X Factor USA judges on stage 18995
Demi Lovato joins X Factor USA judges on stage 18996
Demi Lovato joins X Factor USA judges on stage 18997
Demi Lovato joins X Factor USA judges on stage 18998
Demi Lovato joins X Factor USA judges on stage 18999
Demi Lovato joins X Factor USA judges on stage 19000