Demi Lovato joins X Factor USA judges on stage 27537
Demi Lovato joins X Factor USA judges on stage 27538
Demi Lovato joins X Factor USA judges on stage 27539
Demi Lovato joins X Factor USA judges on stage 27540
Demi Lovato joins X Factor USA judges on stage 27541
Demi Lovato joins X Factor USA judges on stage 27542
Demi Lovato joins X Factor USA judges on stage 27543
Demi Lovato joins X Factor USA judges on stage 27544
Demi Lovato joins X Factor USA judges on stage 27545
Demi Lovato joins X Factor USA judges on stage 27546
Demi Lovato joins X Factor USA judges on stage 27547
Demi Lovato joins X Factor USA judges on stage 27548