Demi Lovato joins X Factor USA judges on stage 27933
Demi Lovato joins X Factor USA judges on stage 27934
Demi Lovato joins X Factor USA judges on stage 27935
Demi Lovato joins X Factor USA judges on stage 27936
Demi Lovato joins X Factor USA judges on stage 27937
Demi Lovato joins X Factor USA judges on stage 27938
Demi Lovato joins X Factor USA judges on stage 27939
Demi Lovato joins X Factor USA judges on stage 27940
Demi Lovato joins X Factor USA judges on stage 27941
Demi Lovato joins X Factor USA judges on stage 27942
Demi Lovato joins X Factor USA judges on stage 27943
Demi Lovato joins X Factor USA judges on stage 27944