Kristin Cavallari Pictures in a Bikini

Kristin Cavallari threw on a bikini yesterday to hang out at a friend's house in LA before heading off for a relaxing night at a spa in her white button-down. She was in a two-piece from Old Navy for the occasion and enjoyed a break from planning her upcoming wedding to Chicago Bears player Jay Cutler. The duo, who started dating last Fall following an introduction from Giuliana Rancic, got engaged at the end of April during a getaway to Cabo. Kristin didn't waste much time before taking her new bling out on the town, as she flaunted the big ring at the West Coast premiere of Something Borrowed earlier this month.