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Frenemies no more! That is, if we believe what they're telling us.

Kristin Cavallari - who wore a blue top in Culver City - attended former rival Lauren Conrad's fashion show yesterday... but why? "Me and Lauren have been cool for a long time, and I’m really proud of her and wanted to support her today," Kristin tells Us. She even sat alongside The Hills' Brody Jenner, Audrina Patridge, Whitney Port and Lo Bosworth.

Does this mean their Cady Heron/Regina George war is finally over?