Zimbio had this story, ok totally fine...I mean, not sure any celebs out there are deliberately trying to hide their hotness, but whatever. Here's my half empty with this though:
Mischa Barton? REALLY. John Mayer? REALLY. Brad Pitt? Jimmy Hoffa couldn't hide that hotness.
Mischa Barton is mentally unstable, possiprobably on drugs, and John Mayer is an ass who thinks that his facial hair/pasty combination makes him hotter, if anything.