What does Chris Brown have in common with Bill Clinton?
How is Brad Pitt like Kevin Federline?
In what way can Justin Bieber commiserate with Robert Pattinson?
All of these stars have been at the center of very public love triangles, proving that relationship issues are not limited to lovestruck teenagers.
We may never top the President of the United States testifying under oath about things he did with an intern and a cigar, but it won't be for lack of celebrities trying.
All these years later, Karrueche Tran is still talking about Rihanna and Chris Brown; while supermarket tabloid editors around the country are likely planning their 789th Brad Pitt-Angelina Jolie-Jennifer Aniston cover story as we type.
Some of these scandalous stories will never die. What makes them so alive in our memory? What makes them such a hot button topic?
Relive 11 of the most memorable love triangles above and remember why now.