Despite their seemingly carefree lives and careers, endless supply of money and free time, preternatural good looks and endless admirers, celebs don't seem to be immune from qlc's. Observe the following examples:

Zach Braff wrote Garden State about his own quarterlife crisis, attempting to become a paid actor while battling depression. He also recently admitted to suffering from "mild depression" in a recent interview, as did his x-girlfriend, Mandy Moore.
Jackie Earle Haley, creepy star of Little Children and formerly known for the Bad News Bears, referred to the awkward period in his life when he couldn't find employment as being "in between a child actor and adult actor."
Margaret Cho recently referred to depression that she experienced in her mid-twenties.
Dustin Diamond seems to be suffering a financial qlc of sorts, resorting to sex tapes and tshirts as a way to earn a living, instead of finding a real job. It must be disheartening when you realize the Screech stick won't last forever...
And Brittney, well - she's past the point of a qlc now. For a while there it looked like the transition to adulthood might have been the cause of her breakdown, but now we can see the issues run much deeper than that.
There must be other qlcelebs...know of any?
Their lives might seem glamorous to us, but even celebs are not immune to inner struggles and identity crises of their own.