Another Fight Brewing for 'The Hills' Girls?

"The Hills" are alive with drama, as usual. says Heidi Montag has been spending time with Lauren Conrad's best friend, Audrina Patridge.

"Audrina and LC are going through a rough patch in their relationship," a source close to the pair tells Perez. "Audrina feels like [Laguna Beach alum] Lo Bosworth is trying to squeeze her out of the picture. There's a lot of tension there. Audrina has been going to Orange County almost every weekend to get away from Lauren."