1. Amanda Bynes
In 2012, Amanda Bynes suffered the strangest public mental breakdown ever. She was a teen star that ruled Hollywood. However, she vanished from the spotlight and stopped appearing in movies.
2012 was a difficult year for Amanda because she started acting weird, wearing odd wigs, attacking celebrities on Twitter, getting a DUI, and most infamously – stripping down in her local gym. It seems that this madness was drug induced and Amanda ended up in rehab.