Yep ass & abs last to come in. You might also experience some loose skin in those areas as you are losing bodyfat. That's where I"ve been putting on the yohimburn & wrappign it all in saran wrap for cardio & sleeping, in a neoprene waist wrap for training. Also how are you plannign to do your last week? Doign a carb deplete, carb up + water deplete? With the water deplete you will also get some skin tightening. And just out if interest, I think I'm goign to try a body wrap (not the herbal wrap) to tighten up. This I'm still researching.
Looking good!