It would appear that the best exercise to target all the areas mentioned would be running. Tummy, thighs & breasts are spread out all over the body and in my experience with weight loss I have found that running is the most efficient calorie burning exercise, I've tried an awful lot of different exercises and nothing puts me in "the zone" like running. There are harder exercises, but I think (and everyone is different) that with running it is about as hard as you can work, and still keep going for long enough to burn some substantial calories. Incedentially, if the tummy thighs & breasts are your trouble areas these are the areas that will lose the weight first when you start to lose weight, no matter what exercise you do, as these are the areas where you are carrying your weight. And its kind of funny that as you keep losing weight these trouble areas will again become more pronounced, say when you have nothing left to lose on your arms, calfs, butt, & face/neck. It is important to keep going once you get to this point as this is the point when you really start reaching your goals. I truly believe in spot toning (with lifting weights), but spot losing is debatable in my opinion. As your trouble areas are spread out your best bet is to just burn as many calories as you can, you'll like the results! If you don't like running, then biking, swimming, or even just a brisk walk with some purpose can be just as effective, if you don't enjoy what you are doing you will never stick with it, so find something you like, do it 4 or 5 times a week ...AND STICK TO IT!!! There is still enough time before summer, best of luck to you.

spot toning only applies to muscle development, not fat loss... if you do exercises for certain muscles, those muscles will develop, but will not affact fat in that area. To get rid of fat you need to make sure you have a negative caloric balance, meaning you spend more calories you consume (you spend a couple thousand keeping yourself alive) regarding caloric intake (I'll get to exercise too) make sure the foods you eat are good quality (protien to build muscles, vitamins for various metabolic processes, omega 3 fats, complex carbs instead of simple surgars...) Eat slow because it takes time to register you're full, and watch your serving sizes!!! Also try not to drink your calories - drink only water, and the occasional pure juice (read ingredients) and milk Getting moving more in general (stairs instead of elevator, and maybe you can't climb all the way up eight floors but climb a flight or two, then take the elevator) Aerobic activity is what you need to do to burn fat. Ignore the fat burning zone as it's more important to burn lots of calories than fat vs carbs. And don't bore yourself with a long time at one intensity, instead mix it up with interval training - warm up, push yourself hard for a minute or two, then lower the intensity till you've recovered, and go hard again... spinning/cycle fit classes have an intructor that will coach a group through various intensities, but you pick the resistance on the bike. interval training is also better for your heart and muscles hope this helps! Good luck

Swimming would be good, alot less impact then running and almost as good, if you can get to a pool regularly.

Cardio-vascular workouts..such as Running, Jogging, Swimming and Cycling..