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After reports surfaced earlier today that Kristin Cavallari was fiending for coke at a Super Bowl party in Miami earlier this month, she tweeted, "Get ur facts straight Us Weekly-ur article is complete BULLSH*T."

We snapped the Hills hottie leaving Urth Caffe on Melrose earlier today, and we didn't exactly get any crackhead vibes from her. So are these reports totally bogus? Or is Kristin secretly battling a drug addiction?