Kristen Stewart doesn't have the best track record when it comes to guys, but she may have just made things even worse. The Twilight actress was spotted having lunch with one of her good friend's recent exes — talk about a no-no!

Click through to see who she was spotted with, then continue clicking to see more stars who dated their friends' exes. Let us know in the comments below if any of these shock you. Do you think it's ever a good idea to date your BFF's ex?

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