Pilates

There are a whole host of exercises for the butt which Pilates is great for, however for the most part, I believe them to be sub-standard when it comes to sheer muscle development. Pilates should be used to lengthen and define muscles rather than build them. As an added benefit, the majority of Pilates exercises are very high reps (50-100 reps) which is also very good for burning fat and adding definition.