The brand new 2013 Cadillac ATS is one of the most surprising cars that we've tested this year. Could it be that ATS stands for A Total Surprise? The Cadillac ATS competes with some of the best and most popular small and sporty entry level luxury cars sold today and that includes the BMW 3 series, the Mercedes-Benz C Class and the A4. Any of these three might easily win the TFLcar Annual 10 Ten Most Fun to Drive Car designation. And now we can add the 2013 Cadillac ATS to this list of fun, fast and favorite cars. The Caddy ATS is a total surprise because of just how good it really is to drive. Check out this exclusive TFLcar video review as we test out Cadillac's smallest and most fun to drive car.