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Amber Portwood

With one punch to the head of her fiancé Gary Shirley in September 2010, “Teen Mom” star Amber Portwood set her life on a massive downward spiral that she is still in the depths of today. The attack, which was caught by MTV cameras and aired on the series, landed Portwood in jail – and also on the radar of CPS, which was concerned about the welfare of her daughter Leah, now 3. As a result, the reality star began abusing prescription drugs and in June 2011, she attempted to take her own life. Portwood checked into rehab for two months, but then violated her probation when she was found with pills and refused a drug test that December. In a shocking turn, Portwood, 22, told a judge in May she would rather go to jail for five years than go to rehab again. On June 5, she began serving her sentence. "I'm not just going to sit," she told ABC News. "I'm going to substance-abuse classes. I'm going to get my GED."

Explosive Stars

Plenty of celebs, including Mel Gibson, Naomi Campbell, Christian Bale, and others, have become famous for their hot tempers.