The average person usually doesn't have the money to keep their face and style looking fresh. And we tend to go with lower quality food because of the cost. So your average joe is almost always heavier and less glamourous than a celebrity.
We talked about this. The average person doesn't have the best diet. And since Lindsay has never seemed to care too much about what she puts in her body, it's quite possible she could be this overweight. Coke and Adderall are expensive, you know?