Super-skinny socialite Nicole Richie has no fears about gaining weight now she's pregnant with her first child, insisting she'll happily balloon 50 pounds if that's what her baby needs. Richie, who is four months pregnant with boyfriend Joel Madden's child, insists her wild partying, drug-taking days are behind her and now all she wants to be is a good mum. And, with that, she has no concerns about her changing image. Richie claims to have gained 10 pounds already and says, "To me, numbers don't mean anything. If I gain 40 pounds, if I gain 50 pounds, then that's obviously what my body needs to do. I'm totally OK with that."