Kristin Leaves Lachey's Pad -- Ducks Questions

Cameras caught 'Laguna Beach' star Kristin Cavallari returning home yesterday and refusing to answer questions about her rumored new beau, Nick Lachey. According to TMZ sources, Kristin was coming back from Nick's new Bel Air mansion.

When the cameraman asked Kristin directly, "When are you going to see Nick again?" Kristin replied, "I'm not going to talk to you about that."

Several of Nick's friends tell TMZ that they're worried Kristin is using the pop star to further her own career.