SOURCES: RIHANNA, CHRIS BROWN HOOKING UP

February 8 marks the three-year anniversary of Chris Brown's infamous assault of then-girlfriend Rihanna.

And it turns out that the exes -- forcibly separated after the beating by court order -- could very well be spending that "anniversary" together. As multiple sources confirm in the new Us Weekly, Rihanna, 23, and Brown, 22, have secretly been hooking up for nearly a year.