Kristin Cavallari Says 'Hills' Is Fake: 'Nothing... Is Real'

After an agonizing Hills season watching Kristin Cavallari wear her heart on her sleeve regarding Brody Jenner (even though he's been Tweeting about and traveling with real-life gal pal Avril Lavigne), the starlet hints her behavior may not have been completely genuine.

"Nothing you see on TV is real," Cavallari, 23, tells PEOPLE. "Fans need to understand it's all entertainment. It's all in fun. I would never put my close friends or a real relationship on a show."