Nicole Richie blames her skinny body on being over-stressed - a condition which killed her appetite. The Simple Life star shocked her friends and family when she rapidly shed her curves over recent months, and she insists she has recognised she has a problem and is trying to put on weight. She says, "I've never been diagnosed with an eating disorder. My weight is a result of stress. "I didn't lose weight on purpose, I simply wasn't eating enough. But I did realise I had gotten too thin. "Now I'm doing all I can to get my weight up - and have gained some. I'm seeing a trainer and a nutritionalist and eating healthy."