7. Dawnette Knight
In 2004, this woman threatened Catherine Zeta-Jones via letters in which she stated she would cut Zeta-Jones up into pieces and feed her to the dogs. Knight also told Zeta-Jones that she knew the layout of her home and who her nanny was. She was in love with Michael Douglas and figure if she got his wife out of the way, she’d have a chance with Douglas. 3 years of jail time was served by Knight after Zeta-Jones nearly had a nervous breakdown.