Kim Kardashian is working on her bounce back game. We haven?t even seen Baby Saint West?s face yet, but his mom is already working on her post-baby body. Six weeks after giving birth, Kardashian has announced she?s signed on as the newest brand ambassador for the Atkins Diet. Kardashian credits the low-carb diet for helping her shed baby weight after giving birth to daughter North West. She tweeted "Teaming up w/ @AtkinsInsider because it works for me!"