Kristin Cavallari's got business on the brain and is back at work following a brutal month. Showing she's ready to put her focus into her jewelry line, the 33-year-old flashed a smile while sitting in her Uncommon James office for the first time since revealing her divorce to Jay Cutler last month. But the star isn't only reeling the effects of her marriage crumbling. Weeks ago, she also announced that her reality show "Very Cavallari" would not be returning to E! for another season.