The heavily-pregnant star - who has previously struggled with her fluctuating weight - bared all for the cover of Elle magazine and admitted she is currently feeling more confident about her body than ever. She said: "Normally I`m hoping to be 107 pounds and I don`t eat, but I ate cheesecake before we shot. "I wasn`t nervous at all, Normally, I`m so shy. I`m not the person you see photographed in a bikini on a beach. But for some reason, being pregnant, it`s so easy for me. I feel so comfortable in my skin." The 31-year-old star - who is engaged to basketball star Eric Johnson - is starting to feel "anxious" about giving birth but insists she isn`t afraid of labour. She told USA Today newspaper: "[I``m anxious] for my water to break, for the day I get to go to the hospital and push. I`m more anxious than afraid. I have not been afraid the whole time. I figure if all these women all around the world can do it, I can do it." Jessica has been told she will deliver a big baby, but was expecting her daughter to be larger than average because of Eric`s tall frame. She said: "She`s in the 90th percentile of weight right now, so she`s a big one. She`s going to be a very big baby, but I guess that`s what I get for letting a baller knock me up." And when the baby does arrive, she will already have a friend in Jessica`s nephew Bronx Mowgli, her sister Ashlee`s three-year-old son with ex-husband Pete Wentz. She said: "Bronx talks to her in my belly all the time. It really makes your heart melt. He`s already got a box of old toys he`s put together for her. "Yesterday, he said he was going to teach her how to crawl and then how to walk. It`s so cute."