From Jesse James cheating on Sandra Bullock, to The Governator's love child, we realized there are a lot of celebrity cheaters who traded in their Porsches for used Ford Pintos (so to speak). It could be true that some people will never know what they've got until it's gone, but in the case of these celebs, knowledge doesn't seem to do any good. Tiger Woods is not included on this list because a few of the dozen women he cheated on his wife with were on par with her... C'mon, at least they didn't attack him with a golf club.
Click on the pictures for a glimpse of the mistresses and those who were cheated on, for a side by side comparison. We may never know exactly why these famous people cheated, but we do know they seriously downgraded. These aren't celebrities with ugly spouses, or were among the ranks of ugly celebrity couples, who were trying to shoot for the stars. The Hollywood cheaters on this list had the best of the best, and still stepped out.Which celebrity cheating scandals have rocked Hollywood the hardest? Which famous couples were torn apart by a third party who was no where near as hot has the Mrs. (or Mr.!)? Check out the list below!