These Celebrities Lost Their Mind When They Became Famous

17. Dustin Diamond

Dustin Diamond was best known as Screech on Saved by the Bell. That was the start of the problem as he could never move away from that character. He started to be known for his temper and his somewhat crazy antics. Then things got really bad when he was convicted of a stabbing a man in a bar on Christmas Day and sentenced to several months in jail.