Could Kristin Cavallari be heading to The Hills?

Just when things started to look up for Lauren Conrad on The Hills - what with being taken to Paris for work and all – it looks like it might be just a little quiet before a storm that could make Heidi and Spencer look like a little drizzle. LC’s nemesis from her Laguna Beach days, Kristin Cavallari, is rumoured to joining the cast. There’s no way LC’s gonna be happy about Cavallari’s claws being anywhere near Brody Jenner (who dated Cavallari about a year ago). "She's threatened to walk away," a source told Star magazine. "She feels as if The Hills was created around her and that she made it what it is today. She hated how she was depicted on Laguna Beach." However, Cavallari’s said to be dating What I Like About You hottie Nick Zano, so really, why worry?