07/13/2013 03:25 pm ET Updated Sep 12, 2013

Demi Lovato Disses Justin Bieber At 'X Factor' Auditions


Demi Lovato used her "X Factor" pulpit to take not one, but two shots at Justin Bieber during auditions this week ... and there was no mistaking her intentions ... she's no fan of Biebs.

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