While it is true that cardiovascular workouts (i.e. aerobic dance or jogging) provide the most efficient ways to burn calories, a person burns calories merely by existing. Also, the more muscle mass you have, the more calories your body will burn naturally.
This is because muscle is an active tissue. However, just because you develop more muscle mass doesn't mean that you should neglect your cardiovascular training. For best results, strive for a balanced workout regimen.