Demi Lovato joins X Factor USA judges on stage 19933
Demi Lovato joins X Factor USA judges on stage 19934
Demi Lovato joins X Factor USA judges on stage 19935
Demi Lovato joins X Factor USA judges on stage 19936
Demi Lovato joins X Factor USA judges on stage 19937
Demi Lovato joins X Factor USA judges on stage 19938
Demi Lovato joins X Factor USA judges on stage 19939
Demi Lovato joins X Factor USA judges on stage 19940
Demi Lovato joins X Factor USA judges on stage 19941
Demi Lovato joins X Factor USA judges on stage 19942
Demi Lovato joins X Factor USA judges on stage 19943
Demi Lovato joins X Factor USA judges on stage 19944