For the 467th time since they broke up, the tabloids are once again speculating that RIHANNA and CHRIS BROWN are secretly hooking up.  A so-called "source" tells the "New York Post" that they've been, "seeing a lot of each other in private."  They even supposedly watched the Heat / Celtics game on Saturday in a private room at Jay-Z's 40/40 club.

The source says, "Everyone in the business assumes she and Chris are getting back together, and it is only a matter of time before they'll be more public about it.  It's like she is testing the water, first they work on music together, then they hang out in a friendly way, so the public won't be completely shocked when they step out together publicly."