MTO SUPER-DUPER World Exclsive!! Chris Brown And Rihanna . . . Are Back TOGETHER . . . And WE HAVE PROOF!!!

We all SUSPECTED that it would happen . . . and now it HAS. MediaTakeOut.com has OFFICIALLY learned that Chris Brown and Rihanna have begun SEEING each other again.

According to a person IN THE KNOW . .. the two have been having SECRET RENDEZVOUS . . . in New York and Los Angeles . . . and rekindling their relationship.

And they're not being TOO CAREFUL about hiding their tracks. You see, two days ago - Rih teeted a pic of her wearing CHRIS CHAIN . . and asking "Were Have You Been". Chris responded, by "liking" that pic.