6. Pamela Anderson and Tommy Lee

Pamela Anderson and Tommy Lee are best known for their infamous sex tape, which has become the standard for celebrity sex tapes. This on-again and off-again couple have had domestic disputes, custody battles, and public accusations. A few years ago, Pamela Anderson reportedly accused Tommy Lee of giving her Hepatitis C. And then there was the fight between Kid Rock and Tommy Lee at the MTV Video Music Awards a couple years ago, which is rumored to have been over Pamela. This relationship was a dysfunctional one for the ages.