Oh boy. Not only will the rumors of Rihanna and Chris Brown reuniting just won't die, but now another reunion is in the works for the pair. Multiple reports say that Breezy will collaborate with RiRi on her 'Birthday Cake' remix.

Producers Da Internz (Kosine and Tuo) of the 'Birthday Cake' remix made a gross understatement. "We got the Rihanna 'Birthday Cake' coming out in a week," Kosine told MTV News, "and the feature on there is gonna shock the world."

The official remix is due out next week. Sources told Miss Info that Brown recorded two features on the song, rapping on one and singing on the other, though it's unclear at this time which (or both) will be used.

Rihanna teased fans on Twitter two weeks ago, asking who they'd want her to feature on the raunchy track's remix. Initially, Rihanna had said, “I need somebody #DIRRRTY on my Birthday #CAKE ; ) lol,” leading to speculation that Christina Aguilera -- the original 'Dirrty' girl herself -- would be the guest of honor, but Rihanna quickly shut that rumor down. “And please!!!! No girls allowed on #CAKE.”

Billboard reports that Brown went to Rihanna's birthday party on Monday night (Feb. 13) and that the pair "came together and were close the entire night." Brown was trying to keep his appearance on the DL, apparently, as he and his reps tried to get all guests to sign confidentiality agreements prior to his entry. We guess that the remix isn't the only 'Birthday Cake' Breezy shared with Rihanna.