These are all excellent suggestions, but keep in mind that the results will depend on the reason your butt is not the shape you want. If it's just a case of muscles needing to be more toned, all of this will work. If it's genetics that have given you a certain shape to your body, it will be much harder. If it's a layer a fat, you cannot lose fat in spots so you'd have to lose weight all over first...etc.
Best of luck!
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