Famous people are wired differently than the rest of us, and some of them are operating way out there on the fringes. Look at people like Lady Gaga or Lindsay Lohan, they are one flew over the cocos nest.

Throughout history, there have been plenty who melted down and actually needed professional help. Before Celebrity Rehab there was classy celebrities who needed help. Here's our list from Guyism.com:

1) Britney Spears

2) Carrie Fisher

3) Winona Ryder

4) Margot Kidder

5) Yoko Ono

6) Marilyn Monroe

Read the full list from Guyism.com.