This time of year, unhealthy temptations abound: chocolate-covered reindeer, log-jam rolls, and gingerbread cars. Curb your treat-sneaking guilt without neglecting your sweet tooth with today's Groupon to Yogurberry. Located in the sleek, secretly-from-the-future Terminus building, this Buckhead shop serves up low-cal, non-fat frozen yogurt and smoothies that make celebrities and pastry chefs abandon their highly publicized affairs with ice cream in favor of a nurturing treat that reforms their image in the media. Stay on track with your New Year's resolution to eat better/learn invisibility/graduate college with this energy-giving snack.A brain freeze usually occurs when a food item of subzero temperature (ice-cream cone, frozen hot dog, et al.) is consumed rapidly, due to extreme deliciousness or an equally extreme desire to enter the movie theater quickly so as not to miss the trailer for Iron Man Too: 2 Iron Men.