It takes a special kind of person to portray someone completely insane -- maniacal behavior shouldn't come naturally to the sane among us -- and some stars seem to have a certain talent for playing sociopaths and psychotic killers. March Madness is right around the corner, and while we know it has nothing to do with clinical madness, it's still a decent excuse to highlight some of the best celebrity portrayals of psychopathic characters. From the fictional to those based on real-life killers, take a look at which celebs do justice to crazy.
Most Notable Nut-job: Patrick Bateman in "American Psycho"
A high-powered investment banker by day, a psychotic ax-murderer by night, Patrick Bateman's main danger is his charisma and superficially pressed and polished appearance. He's a concrete representation of why you shouldn't judge a book by its cover.