Kristin Cavallari wore her bikini yesterday at a friend's LA home, where she manned the barbecue and played some tetherball. It seems she was in good spirits despite the recent news of a split from her fiancé, Jay Cutler. Kristin and Jay called off their engagement two weeks ago, even though they were together in July for a romantic getaway in Miami. Nonetheless, there's likely more two-piece time in store for Kristin since she tweeted about an upcoming vacation. She's heading to Greece tomorrow for some R&R!