Will Rihanna's 'Birthday Cake' Feature Chris Brown?

Reports alternately confirm and deny that Rihanna's ex will feature on the track.

It all began earlier this week, when the production duo known as Da Internz told MTV News that their upcoming remix of Rihanna's "Birthday Cake" featured a super-secret cameo that would "shock the world."

Almost immediately after they made that comment, speculation began to run rampant that it was Rihanna's ex, Chris Brown, who features on the track, and though there was no confirmation from any of the artists' reps, the rumors not only persisted but seemingly gained momentum — especially given reports that Brown attended Rihanna's birthday party earlier in the week.

On Thursday, Hot 97's Miss Info took things to the next level, writing on her blog that Brown does indeed feature on the "Cake" remix, citing a pair of "independent sources" who confirmed the news. She added that Brown contributed both a singing verse and a rap verse to the track, though it wasn't clear if both would end up on the remix.

Of course, that probably comes as news to Da Internz, who have denied that Brown features on the remix. In a subsequently deleted tweet, they responded to a Rihanna fan's question about whether the song would feature Brown with a succinct — and all-caps — "NOPE."

Wrapped up in all this are newly circulating photos that seem to show Brown and Rihanna embracing at her birthday party in Beverly Hills, perhaps confirming that they've reunited. There had been no comment from either artist's camp on the pictures as of press time, though in the days following the party, TMZ reported that all guests were asked to sign a confidentiality agreement, supposedly at Brown's insistence.

There's still been no official word on when the "Birthday Cake" remix will be released (some reports suggest it'll be out next week), and reps for Da Internz, Brown and Rihanna did not respond to MTV News' request for comment on the track — meaning that, like the rest of the world, we're just going to have to wait to learn the identity of RiRi's mystery collaborator.