500 Days of Kristin, Day 53: Why Can't Science Stay Away from Kristin? Allie Jones · 03/19/15 02:50PM This week, Kristin Cavallari's already fraught relationship with science deteriorated faster than her friendship with Stacy the Bartender on The Hills. Science is shady, dude. Do you even know what science has been up to behind Kristin's back?