Audrina Patridge: Not a Fan of Kristin Cavallari

Looks like the long-running feud between Lauren Conrad and Heidi Montag (and the recent producer-forced reconciliation) is sooooo last week.

A new battle could soon be emerging on The Hills, with Audrina Patridge and LC's replacement and old nemesis Kristin Cavallari squaring off.

"I don't like her," Patridge said on Ryan Seacrest's KIIS-FM radio show.

Audzo confirmed the two had a fight the first day of filming new episodes. It is rumored that Kristin is pursuing Patridge's smelly ex, Justin-Bobby.

She did not divulge details, but said, "When someone gets in my face, I have to defend myself ... I can't say much. They'll show it, but I mean, all I have to say is, it's really pathetic and desperate what people will do when the cameras are around."

Audrina is picking up where LC left off in hating on Kristin.

"It was my birthday, and I was just like, Oh, my God. Is this what we're going to have to deal with?'" Audrina Patridge recalled on the radio show.

Audzo did not discuss her fling with Star Trek's Chris Pine: "There's always speculation of anyone I hang out with or anything I do," she coyly said.

Pressed for more, she replied, "My lips are sealed."

But while she wouldn't go on the record as riding the Pine, she could not resist slamming her ass clown ex, leaving with this parting shot: "From Justin-Bobby, I think any guy is an upgrade. I've learned so much since that relationship."

Oh, snap. Whose side are you on ...