Demi Lovato joins X Factor USA judges on stage 27909
Demi Lovato joins X Factor USA judges on stage 27910
Demi Lovato joins X Factor USA judges on stage 27911
Demi Lovato joins X Factor USA judges on stage 27912
Demi Lovato joins X Factor USA judges on stage 27913
Demi Lovato joins X Factor USA judges on stage 27914
Demi Lovato joins X Factor USA judges on stage 27915
Demi Lovato joins X Factor USA judges on stage 27916
Demi Lovato joins X Factor USA judges on stage 27917
Demi Lovato joins X Factor USA judges on stage 27918
Demi Lovato joins X Factor USA judges on stage 27919
Demi Lovato joins X Factor USA judges on stage 27920