Rihanna is sitting on top of the Billboard charts, and to celebrate, she's rocking a brand new Rolex. But did Chris Brown gift RiRi the luxurious timepiece?

Here's the scoop: On Wednesday (Nov. 28), the 'Unapologetic' star tweeted a photo of her new bling with the caption, "Don't believe me just watch #newtoy #justcusimnumber1 #roleylife #dopedealer."

Then, on the same day, Brown posted a photo of his new Rolex with simply, “Ball game!" Then today (Nov. 29) Breezy posted another pic of the watch with the caption "Went simple today!" Uh, we think Rihanna and Breezy are playing games with us!

The 'Nobody's Business' collaborators have been spending a lot of, well, time together lately, which makes their seemingly matching watches oh-so-apropos. The two were spotted partying in Berlin together over Thanksgiving, when Rihanna tweeted an en route pic saying, "All alone in my big ole jet!!! See u soon lover."

Just days later, the pop star raised more eyebrows when she posted an Instagram photo of what looked like Brown, shirtless and laying face down on top of a bed. The caption included the hashtag "#BartObsessed."

We can't be sure if Brown gave Rihanna her new watch -- after all, she could have just bought it for herself -- but we wouldn't be surprised if he did. Whether her fans approve is another story, though.

Watch the Rihanna 'Diamonds' Video