So Rihanna and Chris Brown are just "best of friends"? The "Diamonds" singer spent Christmas day getting cozy with Brown at an LA Lakers game and left chatting and holding hands with him, Huffington Post reports. She even followed by posting an Instagram photo of herself smoking on the hood of a car beside a shirtless Brown. Despite his 2009 assault on Rihanna—and rumors he is still seeing his ex, Karrueche Tran—Brown also spent Thanksgiving with Rihanna in Germany. The title of their latest collaboration: "Nobodies Business."