When you live in the same city with ex its hard not to run into each other, and their girlfriend. Chris Brown, Rihanna, Rihanna's side kick/ bestie Melissa, and Drake were all partying it up at Geystone Manor for the Superbowl afterparty on Sunday night. Ummmm... I wonder did they acknowledge each other's presence since they are still "hooking up". Here are some pics of them leaving below: