If you aren't breastfeeding (which by the looks - she is not) you can go in and have your stretch marks lasered off soon after you have the kids. If you wait a year or so, the results aren't that great.
Not everyone gets stretch marks. I've never had one in my entire life and now that I'm pregnant I'm hoping to never see them! Cellulite on the other hand - I have plenty.. LOL I don't need both
Her stomach looks pretty tight for just having the twins. She has no 'goo' so to speak. Then again, didn't Heidi Klum do the VS fashion show 3 mos. after giving birth?