Demi Lovato joins X Factor USA judges on stage 19909
Demi Lovato joins X Factor USA judges on stage 19910
Demi Lovato joins X Factor USA judges on stage 19911
Demi Lovato joins X Factor USA judges on stage 19912
Demi Lovato joins X Factor USA judges on stage 19913
Demi Lovato joins X Factor USA judges on stage 19914
Demi Lovato joins X Factor USA judges on stage 19915
Demi Lovato joins X Factor USA judges on stage 19916
Demi Lovato joins X Factor USA judges on stage 19917
Demi Lovato joins X Factor USA judges on stage 19918
Demi Lovato joins X Factor USA judges on stage 19919
Demi Lovato joins X Factor USA judges on stage 19920