13. Robin Williams
Robin Williams struggled with addiction for many years. He took his own life in the summer of 2014.
14. Scott Disick
It took an embarrassing incident in Costa Rica in the spring of 2015 for Disick to finally seek professional help.
15. Jon Hamm
Not long before the final run of Mad Men episodes kicked off, it was revealed that Jon Hamm completed a 30-day program for alcohol abuse.
16. Liza Minnelli
It was announced in the spring of 2015 that this beloved, veteran actress and singer had checked into a facility for substance abuse.
17. Nick Gordon
Nick Gordon lost it in a very public way. He broke down on Dr. Phil over the state of Bobbi Kristina Brown and then checked into rehab.
18. Ireland Baldwin
We wish Ireland Baldwin well. In April of 2015, the young star checked into rehab for what she deemed to be "emotional trauma."
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