Chris Brown, Rihanna Breakup? 'Diamonds' Singer Has Dinner With Ex Matt Kemp

Chris Brown and Rihanna must be on the outs again. The "Diamonds" singer was seen having dinner with her ex-boyfriend Matt Kemp on Jan. 13.

Kemp, 28, who is an outfielder for the Los Angeles Dodgers, was seen waiting at a Los Angeles restaurant sitting at the bar by himself until Rihanna walked in and the pair were hauled off to a private dinner table. Prior to her arrival, Kemp took photos with fans, according to two eyewitnesses.

The onlookers took a photo of Kemp sitting at the bar alone and another of Rihanna when she arrived. Separate photos of Kemp and Rihanna can be seen here.

The Bajan beauty would later post a photo herself at the dinner table - possibly to let Brown know she was out to dinner with someone else?

The dinner meeting occurred after she tweeted a series of cryptic messages on Twitter and Instagram that may have alluded to Brown.

She posted a photo on Instagram on Jan. 10 of Donald Duck with the caption: "I have to stop saying 'How stupid can you be' I think people are starting to take it as a challenge."

On Jan. 11 she tweeted: "boys will be boys!!! Cause they can't be men!"

The dinner sighting on Jan. 13 is not the first time the former couple have been seen togther in one place. On Jan. 1, The YBF posted a photo of Rihanna at Sean "Diddy" Combs' New Year's Eve bash. In the image, Kemp is standing in the background in a tuxedo as RiRi smiles for paparazzi.

Rihanna and Kemp dated from January of 2010 and split in December of 2010, according to Us Weekly. According to sources, their hectic schedules made it impossible to stay together. "He just can't keep up with her crazy travel schedule," one source told Us.

"Matt's sick of always following after her like a puppy dog all over the world. He wants something more normal," the source added.