Lauren Conrad & Stephanie Pratt: BFFs

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Lauren Conrad and new BFF Stephanie Pratt - sans new beau Brett Novek - head to The Grove for some coffee and shopping in Los Angeles.

Apparently there's some tension on The Hills with Audrina Patridge and Lauren Conrad no longer on speaking terms!

Lauren Conrad and Stephanie Pratt Pic

Audrina reportedly hasn't even been staying in Lauren Conrad's guest house recently. LC has taken up with Stephanie Pratt instead.

"She hasn't officially moved out yet, but she stays with different people. It's grown so bad between them she doesn't want to be there," an insider told Page Six. "If your star starts to burn brighter than Lauren's, there's going to be trouble."

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.