One hot mama!

What is the best post partum work outs you guys have found? I'll already be breast feeding after her birth but I really want to be that mom that people look at and think "there's no way you have a baby!" I'm 7 months and I'm already not THAT big but I'm REALLY physically active everyday I'd just love to get as close to pre pregnancy body before going back to work as possible! Thanks mamas!