Demi Lovato joins X Factor USA judges on stage 01537
Demi Lovato joins X Factor USA judges on stage 01538
Demi Lovato joins X Factor USA judges on stage 01539
Demi Lovato joins X Factor USA judges on stage 01540
Demi Lovato joins X Factor USA judges on stage 01541
Demi Lovato joins X Factor USA judges on stage 01542
Demi Lovato joins X Factor USA judges on stage 01543
Demi Lovato joins X Factor USA judges on stage 01544
Demi Lovato joins X Factor USA judges on stage 01545
Demi Lovato joins X Factor USA judges on stage 01546
Demi Lovato joins X Factor USA judges on stage 01547
Demi Lovato joins X Factor USA judges on stage 01548