Let the rumors start swirling — Khloe Kardashian was spotted wearing a giant diamond right on her left hand ring finger and fans think that she might be engaged to Tristan Thompson. The Good American mogul, 36, was seen wearing the huge rock during a December 22 outing with Tristan, 29, and their two-year-old daughter, True, in Boston, where Tristan has relocated to play for the Boston Celtics.