I'm working out 6 days a week doing Jillian Michaels DVD's. I've read that it's good to incorporate cardio into a workout routine which I'm happy to do, but wondered if cardio would make me lose my curves? I want to have a curvy and toned bum and hips etc. Any advice?
Cardio tends to reduce fat without building muscle (this does depend on the intensity and duration of the exercise). So it is likely to remove fat from boobs and hips at the same time as the rest of the body.
The distribution of fat on the body is largely genetic (although hormones can affect this too), so if you tend to be a pear or an hourglass you'll probably retain that basic shape unless you're very obese or emaciated.
Muscle tone will also affect body shape, eg if you do strength training for your glutes your backside will get bigger and rounder. So a combination of weights and cardio is the best for losing fat while retaining curves.