Rihanna 'R8' Album Cover Instagram LEAK? [PHOTO]: Drake's Ex Hypes New Music (Video) Amid Chris Brown Dating Drama, Grammy Nomination Sparks Eminem Collaboration Buzz?

Details surrounding Rihanna's highly-anticipated upcoming album (rumoredly entitled R8) still remain a total mystery. But the 26-year-old pop sensation continues sharing rather cryptic "clues" on Instagram... is this a sneak-peek of the record's stunning cover art?

Maybe... or perhaps RiRi's already filming a hot new music video? The Barbadian songstress loves keeping her fans "in the know," but in such a teasing way!

Earlier this month, Drake's ex also shared this in-studio snippet on Instagram. Several loyal #TeamNavy enthusiasts assumed that she's currently working on some fresh tunes for the release:

 phuck wit nuno

A video posted by badgalriri (@badgalriri) on Dec 12, 2014 at 1:03pm PST

Cool stuff.

So, how about another Eminem collaboration? The "Pour It Up" crooner and her "The Monster" tour buddy make some awesome beats together - would MstarsNews readers enjoy a surprise Slim Shady appearance?

Twitter's down... especially since the duo just got a Grammy nomination for their MMLP2 mega-hit:

@JohannaB21: "Congratulations on #TheMonster being nominated for Best Rap/Sung Collaboration at the Grammys! @Eminem x @Rihanna."

@dustdarnell: "I'm pretty sure I would like any collaboration done with Eminem and Rihanna..."

@SupremeNavy: "Best Rap/Sung Collaboration... @rihanna @Eminem Yaaas #GRAMMY."

@RihannaR4ever: "Rihanna's hit with Eminem ''The Monster'' received a Grammy nomination for Best Rap/Sung Collaboration!"

@RihannaStats: "Correctly predicted a Best Rap/Sung Collaboration Grammy nomination for #TheMonster. It was a huge record! Good luck, @eminem and @rihanna!"

Well, stay tuned... and keep the hints coming, Rihanna!

In other RiRi news... controversial ex-boyfriend Chris Brown is still single after breaking things off with on-and-off again sweetheart, Karrueche Tran. Apparently, the hip-hop superstar is very lonely for the holidays... would a Chrianna romance ever happen? Or is the "Stay" wild-child officially over her former beau? Share your thoughts in the comments below, MstarsNews readers! How about a collaboration between those two?