Lindsay Lohan -- where did it all go wrong? The 24-year-old actress has been sentenced to 90 days in jail and 90 days of rehab after a judge ruled that she violated her probation by missing alcohol education classes and failing to appear at a May DUI progress hearing.

We can pinpoint the exact moment when Britney Spears hit her lowest -- the great hair-shaving incident of 2007 and the follow-up umbrella attack. But with Lindsay, it's a little bit more difficult.

Looking back at her career, it seems like the signs that Lohan was spiraling out of control were far more subtle.