‘It all seems so wacky and incestuous, but that's kind of how life works...' You WON'T BELIEVE which stars dated their friends' EXES!

'Thou shall not date a friend's ex” is a friendship rule that the following stars simply IGNORED! These celebrities didn't care about that sacred, unspoken agreement and went for it with a pal's former boyfriend or former girlfriend. Did they get in trouble for it? Read on to find out...