What the fuck happened to Lindsay Lohan?

I don't think any celebrity has as rapidly gone from very attractive to horribly disgusting in as short a period of time as Lindsay Lohan. One minute, she's a curvy, hot young actress. Now, she looks like a younger version of Maria Shriver, AKA Skeletor. There has to be some kind of petition to sign or protest to attend. Maybe a telethon? Send in donations to buy Lindsay a sandwich?