Rihanna, Karrueche Tran feud over Chris Brown online

Chris Brown's new girlfriend, Karrueche Tran, and his old (and possibly rekindled) flame, Rihanna, don't get along. And now an escalating war of words and Twitpics between the two women has many wondering if Rihanna is really over her onetime batterer or if there is in fact truth to the rumors that she's seeing him again.

Last week, Rihanna aimed an attack at Tran when she posted a photo on Twitter of a bag of rice cakes wearing sunglasses and gold hoop earrings. Tran is half-Vietnamese and the photo could be perceived as a poke at her ethnicity.

"Ima make u my b****," Rihanna wrote alongside the photo.

Classy.

Tran, for her part, has been outspoken about her opposition to Brown's recent collaboration with his ex on a remix of her single "Birthday Cake."

"I'm Angeline (sic), you're Jen. C'mon you see where Brad is at," wrote Tran on her Facebook page on Monday (March 5), making a hilariously misguided reference to Angelina Jolie, Brad Pitt and Jennifer Aniston.

Rihanna fired back on Tuesday again on Twitter, writing, "I'm a leader, yall on some followin s*** ... coming in dis game on some modeling s***!"

Tran, 23, is a self-proclaimed model.

Rihanna, for the record, is 24. About 10 years too old for this kind of silliness.