It's nearly impossible to cheat in Hollywood without SOMEONE leaking the story to a tabloid. That's good for business. Bad for celebrities caught with their pants down.
(NOTE: If you don't want to get caught, maybe don't do it...)
Some of Hollywood's hottest couples coughBRANGELINAcough came to be through infidelity. When the two co-starred in Mr & Mrs. Smith, Brad Pitt was famously married to Jennifer Aniston.
Now he's infamously partnered with Angelina Jolie and their six (!) children. We estimate the two have been planning a wedding for nearly a decade now.
The good news? Angelina Jolie is far from alone in her homewrecking ways. She's actually in quite popular (and even royal) company!
Take a look at 17 celebrity wives who were mistresses first: