Demi Lovato joins X Factor USA judges on stage 32910
Demi Lovato joins X Factor USA judges on stage 32911
Demi Lovato joins X Factor USA judges on stage 32912
Demi Lovato joins X Factor USA judges on stage 32913
Demi Lovato joins X Factor USA judges on stage 32914
Demi Lovato joins X Factor USA judges on stage 32915
Demi Lovato joins X Factor USA judges on stage 32916
Demi Lovato joins X Factor USA judges on stage 32917
Demi Lovato joins X Factor USA judges on stage 32918
Demi Lovato joins X Factor USA judges on stage 32919
Demi Lovato joins X Factor USA judges on stage 32920
Demi Lovato joins X Factor USA judges on stage 32921