Demi Lovato joins X Factor USA judges on stage 28537
Demi Lovato joins X Factor USA judges on stage 28538
Demi Lovato joins X Factor USA judges on stage 28539
Demi Lovato joins X Factor USA judges on stage 28540
Demi Lovato joins X Factor USA judges on stage 28541
Demi Lovato joins X Factor USA judges on stage 28542
Demi Lovato joins X Factor USA judges on stage 28543
Demi Lovato joins X Factor USA judges on stage 28544
Demi Lovato joins X Factor USA judges on stage 28545
Demi Lovato joins X Factor USA judges on stage 28546
Demi Lovato joins X Factor USA judges on stage 28547
Demi Lovato joins X Factor USA judges on stage 28548