Demi Lovato joins X Factor USA judges on stage 16537
Demi Lovato joins X Factor USA judges on stage 16538
Demi Lovato joins X Factor USA judges on stage 16539
Demi Lovato joins X Factor USA judges on stage 16540
Demi Lovato joins X Factor USA judges on stage 16541
Demi Lovato joins X Factor USA judges on stage 16542
Demi Lovato joins X Factor USA judges on stage 16543
Demi Lovato joins X Factor USA judges on stage 16544
Demi Lovato joins X Factor USA judges on stage 16545
Demi Lovato joins X Factor USA judges on stage 16546
Demi Lovato joins X Factor USA judges on stage 16547
Demi Lovato joins X Factor USA judges on stage 16548