Rihanna and Chris friends or a Couple?

Rihanna and Chris's relationship is very questionable. We have spotted pictures of them everywhere leaving the club together. Well the twosome were recently spotted out at a club in Berlin trying to do their best not to make it obvious. Both Ri Ri and Chris Brown were in Berlin doing their shows. Rihanna with her 777 tour, and Chris Brown doing a concert. The two took a break and enjoyed a night on the town. But we are all thinking are they a couple or not.

What do you guys think?