Rihanna's spat with Chris Brown's new girlfriend

Rihanna is embroiled in a war of words with Chris Brown's girlfriend.

The You Da One singer - who dated Chris until he assaulted her in February 2009 - appears to have been sending a series of subtle insults at his current girlfriend, Vietnamese model Karrueche Tran.

Earlier this week, she tweeted a photo of a bag of rice cakes wearing sunglasses and with gold earrings, with the caption, "Ima a make u my bitch," which many have interpreted as a jibe at Karrueche.

When a follower then tweeted "@rihanna save me some rice cakes rather hungry," she hit back with the comment: "Kinda DRY tho."

Karrueche is then said to have replied via posts on Facebook, writing: "Let me clear the air, if you have fenty at the end of ya name or your default Is Rihanna you have a better chance of winning the lottery than ending up on my friends list. (sic)"

However, the model has since denied she has a Facebook page.

This hasn't stopped Rihanna, who continued to post messages on Twitter last night writing lyrics from a Lil Kim and Mobb Deep track, reading: "I'm a leader, yall on some followin s**t ...

"Coming in dis game on some modelling s**t."

Although they split in 2009, recently Rihanna and Chris have been seen at a number of the same events, and he appeared on a sexually explicit remix of her track Birthday Cake.

A source told Us Weekly magazine: "Rihanna loves to live dangerously, and talking to and hooking up with Chris is all part of that."

Rihanna recently told UK TV host Jonathan Ross she misses being in a relationship, saying: "You want to share your life with someone. That's what I'm missing right now."

- Bang! Showbiz