Kim Kardashian has revealed that her unborn baby is much bigger than her first. Her little boy is already 7lbs, while North was just 4lbs when born. The star is 8 months along in her pregnancy and revealed just how much weight she has gained. She revealed this info in a pregnancy update on her app, where she described her son as a really heavy pineapple. The star tweeted that so far she has put on 52lbs with the pregnancy, and said she's finding it hard to manage her weight gain.