For the first time in YEARS, Chris Brown and Rihanna arrived at a public event TOGETHER -- sitting side-by-side at the Lakers vs. Knicks game at Staples Center.
The two arrived to the arena in the same car earlier today, but got out of the vehicle separately. They eventually met up inside and sat down together in their courtside seats.
Chris and Rihanna haven't officially announced they're back on -- but it sure as hell seems like it ... especially with Chris dumping his old GF Karrueche Tran over his undying "love" for RiRi.
Of course, Rihanna dumped Chris back in 2009 after he beat the crap out of her. Brown eventually pled guilty to assault and is still on probation stemming from that incident.
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