Demi Lovato joins X Factor USA judges on stage 33934
Demi Lovato joins X Factor USA judges on stage 33935
Demi Lovato joins X Factor USA judges on stage 33936
Demi Lovato joins X Factor USA judges on stage 33937
Demi Lovato joins X Factor USA judges on stage 33938
Demi Lovato joins X Factor USA judges on stage 33939
Demi Lovato joins X Factor USA judges on stage 33940
Demi Lovato joins X Factor USA judges on stage 33941
Demi Lovato joins X Factor USA judges on stage 33942
Demi Lovato joins X Factor USA judges on stage 33943
Demi Lovato joins X Factor USA judges on stage 33944
Demi Lovato joins X Factor USA judges on stage 33945