Demi Lovato joins X Factor USA judges on stage 12537
Demi Lovato joins X Factor USA judges on stage 12538
Demi Lovato joins X Factor USA judges on stage 12539
Demi Lovato joins X Factor USA judges on stage 12540
Demi Lovato joins X Factor USA judges on stage 12541
Demi Lovato joins X Factor USA judges on stage 12542
Demi Lovato joins X Factor USA judges on stage 12543
Demi Lovato joins X Factor USA judges on stage 12544
Demi Lovato joins X Factor USA judges on stage 12545
Demi Lovato joins X Factor USA judges on stage 12546
Demi Lovato joins X Factor USA judges on stage 12547
Demi Lovato joins X Factor USA judges on stage 12548