We've been assuming for a while now that RIHANNA and CHRIS BROWN are back together.  But that may have changed.  Yesterday she posted a picture on Instagram that read, "Being single sucks.  The only thing I get to do anymore is whatever the [eff] I want to."  (Check it out here.)  (Instagram)

Meanwhile, CHRISTINA MILIAN seems to think that Chris is still dating Karrueche Tran.  You can read more about that and watch video here.