MTO WORLD EXCLUSIVE: Rihanna And Chris Brown Attended TWO Halloween Parties Together!!! (Pics)

: Rihanna had TWO parties last night – first a private AFFAIR at her Hollywood Hills crib . . . then at Greystine – one of the hottest clubs in NYC. And Chris Brown was AT BOTH EVENTS – as her date!!

We’re still working on getting pics of them together. But VIP had a strict NO PHOTOS policy there.