Paris Hilton & Mischa Barton At War!

Paris Hilton and Mischa Barton are at war over their rocker boyfriends, according to a U.K tabloid.

The former friends have been forced to cross paths on Good Charlotte's UK tour.

Paris is playing groupie to her boyfriend, Benji Madden's band, whilst Mischa is dating Taylor Rocke, guitarist with Rooney, who are supporting the headliners.

But, reports the Mirror, there’s only room for one celebutard ego on the tour bus.

Mischa reportedly fell out with Paris after she started dating Cisco Adler, the ex-boyfriend of Hilton’s best friend Kimberly Stewart. and he of dangly-balls fame.

She said at the time: “Paris isn’t my rival. I met her one or two times and she’s making out there’s this big rivalry between us and there so isn’t.

“[Hilton] seems to hate everyone around her age who is more successful. Silly bitch...She does steal people’s boyfriends!”