![OK Logo](https://okmagazine.com/ok_logo_black_small.png)
'The X Factor' Drama: Demi Lovato vs. Britney Spears: It's War!
![Sm25.jpg](https://media.okmagazine.com/brand-img/_kjHRFz7T/480x251/2012/06/sm25.jpg?position=top 480w, https://media.okmagazine.com/brand-img/_kjHRFz7T/640x335/2012/06/sm25.jpg?position=top 640w, https://media.okmagazine.com/brand-img/_kjHRFz7T/768x402/2012/06/sm25.jpg?position=top 768w, https://media.okmagazine.com/brand-img/_kjHRFz7T/1024x536/2012/06/sm25.jpg?position=top 1024w, https://media.okmagazine.com/brand-img/_kjHRFz7T/1280x670/2012/06/sm25.jpg?position=top 1280w, https://media.okmagazine.com/brand-img/_kjHRFz7T/1440x753/2012/06/sm25.jpg?position=top 1440w, https://media.okmagazine.com/brand-img/_kjHRFz7T/1600x837/2012/06/sm25.jpg?position=top 1600w, https://media.okmagazine.com/brand-img/_kjHRFz7T/2160x1130/2012/06/sm25.jpg?position=top 2160w)
Jun. 10 2012, Published 5:00 a.m. ET
They're former Disney darlings turned pop stars who've battled personal demons in the public eye, and now they're judging The X Factor.
With everything they have in common, you'd think Britney Spears, 30, and Demi Lovato, 19, would become fast friends. But in fact, the two singers can't stand each other — and their fiery feud is making working on the X Factor set unbearable!
OK! NEWS: SIMON COWELL MISSES X FACTOR AUDITIONS DUE TO BRONCHITIS
"Tensions are at the boiling point," a show insider tells Star. "There is a bitter rivalry between them, and it's already pretty much exploded — which is crazy considering how early into filming it is."
OK! NEWS: SIMON COWELL DEFENDS BRITNEY SPEARS AMID X FACTOR WALK-OUT RUMORS
"Demi thinks Britney is a twit, and Britney thinks Demi is beneath her," another source says. "They avoid each other as much as possible when the cameras aren't rolling."
FOR MORE ON DEMI AND BRITNEY, PICK UP THE NEW ISSUE OF STAR, ON SALE NOW!