Laguna Beach's Kristin Cavallari will replace her nemesis Lauren Conrad on the MTV series The Hills when it returns for its fifth season. “I’m not going into it like, ‘I’m going to make great friendships with these people.’" Cavallari tells EW. "It’s work! And drama sells.” Cavallari isn't above taking shots at her old rival Conrad. “I’m a completely different person than Lauren,” she says. “I have a lot more energy. I’m more outgoing.” Cavallari is set to appear on The Hills season finale catching the bouquet at Heidi Montag and Spencer Pratt’s wedding. (Photo: WENN)

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