Rihanna & Chris Brown

Here is one couple that most people agree should stay far away from each other. After denying their friendship was anything more than that for so long, the two finally came out as boyfriend and girlfriend last year. Who knew their relationship would take such an ugly turn almost a year later when Chris allegedly punched Rihanna in the face after a Grammy after party. When she didn't press charges and apparently chose to forgive him, fans were even more shocked. For Rihanna's sake, let's hope nothing like that ever happens again!