DVD help to tighten up abdomen

So I finally lost all my baby weight and then some doing Jillian Michaels Body Revolution along with her other dvds. I absolutely loved it and highly recommend it to anyone. However I still have a little too much excess skin around my abdomen and I need some suggestions on what to do next that will help tighten this up. Do I do HIIT or start doing pilates like my Core Fusion to tighten it up? I have Zumba and I love it but its just not as intense to me anymore. Any help would be appreciated