Nicole Richie says she’s eating every hour to make sure her baby is healthy! “I eat all the time, especially now. I’m constantly hungry. I’m eating at least every hour,” Richie tells ABC’s Diane Sawyer. In an interview for Good Morning America and 20/20, Richie says “Just like any mother, you know, you want to take the best care of yourself, especially while you’re pregnant. And I’m definitely eating healthier now, and I’m really playing by the rules.”

That means no sushi, caffeine, alcohol, pills, marijuana or smoking. Even her beau Joel Madden has given up his pack-and-a-half-a-day cigarette habit.

As for her frail frame, Richie denies having an eating disorder and says drugs could have played a role in her weight loss. “I’ve never had an eating disorder. Ever… It’s anxiety. It’s stress. It’s just not being careful.” When she looks at older photos of her scary-skinny body, she says, “I see a girl that is obviously going through something and is much too skinny.”

Now, the Simple Life star — who estimates she has gained about 10 lbs. in her pregnancy so far — says she’s “totally okay” with gaining 40-50 pounds if “that is what my body needs to do.”