Child Actors, Todd Bridges on Diff'rent Strokes, Dana Plato, who had to go into Porn, etc, etc.

The Generic Horrible Life for The Entertainment Industry:

The little kid starts out in commercials, gets abused behind the scenes by his parents, get his big break on a huge Sitcom. Makes millions of dollars and at the height of success, feels lonely and is very deppressed. When the show gets cancelled, he goes into a whirlwind of crack cocaine and goes to prison. When he/she comes out, they get back into the drug scene and are found dead in an alley, by way of O'D.