Demi Lovato joins X Factor USA judges on stage 19993
Demi Lovato joins X Factor USA judges on stage 19994
Demi Lovato joins X Factor USA judges on stage 19995
Demi Lovato joins X Factor USA judges on stage 19996
Demi Lovato joins X Factor USA judges on stage 19997
Demi Lovato joins X Factor USA judges on stage 19998
Demi Lovato joins X Factor USA judges on stage 19999
Demi Lovato joins X Factor USA judges on stage 20000