Kristin Cavallari is enjoying a big braless bend-over because it's the weekend. The 34-year-old reality star and fashion designer slipped out of her entertainment shoes and into her entrepreneur ones on Sunday, updating her Instagram with a little behind-the-scenes action from a shoot for her Uncommon James Jewelry line – the resulting headlines likely come welcome for the blonde whose split from ex Jay Cutler just heated up as both posted the same Instagram selfie together. Check out the sizzling dress below.