Is Chris Brown's girlfriend Karreuche embroiled in a 'war of words' with love rival Rihanna?

There is no love lost between Rihanna and Chris Brown's new girlfriend, Vietnamese model Karrueche Tran, according to new reports.

The two women have become embroiled in a very public feud, according to Radar Online and The New York Post. 

The tension is said to have kicked off when Rihanna posted a photograph of a bag of rice cakes wearing sunglasses with gold earrings, and the caption, 'Ima a make u my b****.'

This has been widely perceived as a jibe at Tran, who of Vietnamese origin.Further proof is provided on Rihanna's remixed song Birthday Cake - which saw her sensationally reunited with Brown.

On the sexually explicit track, she sings the line: 'Remember how you did it?, Remember how you fit it?, If you still wanna kiss it, Come, come, come and get it, Sweeter than a rice cake, cake worth sipping.'

She then responded to a follower who wrote: ‘@rihanna save me some rice cakes rather hungry,' with the rather acerbic comment: 'Kinda DRY tho.'

Dig? Rihanna posted a picture of a bag of rice cakes, gold earrings and sunglasses, which could be perceived as a dig at Karrueche

Retort: Rihanna retorted that the rice cakes are 'kinda dry tho' on her Twitter

In response, Karrueche is reported to have posted on her Facebook page: 'I’m Angeline (sic), you’re Jen. C’mon you see where Brad is at.'

However, this was later shown to have been a comment made by one of Rihanna's followers.

She then is alleged to have added: '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.'

However, Karrueche has denied that she even has a Facebook page. 

Yesterday Rihanna posted another missive on Twitter which said: 'I’m a leader, yall on some followin s***... coming in dis game on some modelling s***', quoting lyrics from Lil Kim/Mob Deep’s Quiet Storm remix.

Ride or die: Brown and Karrueche seen on holiday together recently and she has posted tweets of their domestic life including a soul food feast

Her comments could have been construed as a thinly veiled dig at Karrueche, who is a model.

Denial: Chris Brown has denied he is back together with Rihanna

According to the New York Daily News, Rihanna and 22-year-old Brown are rumoured to  have been 'seeing each other in secret.

'Rihanna loves to live dangerously, and talking to and hooking up with Chris is all part of that,' a friend told Us magazine of the couple’s potential rendezvous.

However, the couple have both dismissed the persistent rumours that they are back together. 

Rihanna recently told Jonathan Ross on his TV show that she missed being in a relationship. 

'Single life is so overrated,' she said. 

'It sucks. I have such incredible experiences in my life. You don’t want to live your life and then meet someone. 

'You want to share your life with someone. That’s what I’m missing right now.”

Meanwhile, a representative for Brown has denied the R&B singer is back together with Rihanna.

'He and Rihanna are just friends,' the representative told Us. 'He’s not cheating.'

Celebrities not exempt! Miley Cyrus risks huge fine by leaving her sports car in disabled parking spot to do Pilates

Miley Cyrus is an affable young starlet. 

Firstly she's the country alt progeny of Achy Breaky Billy Ray, which is brilliant, and secondly, she doesn't take herself too seriously, oh, and she loves to help homeless animals. 

In fact she's a veritable real life Disney princess, if you ignore the tiny denim shorts. 

The evidence: Miley is a thoughtful celebrity, one who rescues dogs in her spare time, but she didn't spare a thought for her less mobile human counterparts today 

However today, in one horrifying slip up, the youngster seemed to display the flagrant disregard for mere mortals associated with the biggest diva or deluded wannabe.

Pregnant Jessica Simpson Gets Nude for Elle, Reveals Baby’s Sex

Jessica Simpson and fiance Eric Johnson (Carter Smith/ELLE)Following in the footsteps of Claudia Schiffer, Mariah Carey, and the woman who started it all, Demi Moore, a heavily pregnant Jessica Simpsonhas thrown modesty out the window as she bares all -- save for a few select parts covered by her hands -- on the cover of a magazine. (Scroll down to see the entire cover. Discretion advised.) But the 31-year-old doesn't just reveal her new, bigger body in Elle's April issue , she also reveals some pretty big news: The singer-turned-actress-turned-fashion designer is having a girl! And she's hoping for a girly girl at that.

[Related: Celebrity Baby Bump Gallery]

"Ah swear, ah will croak if she asks me for a pair of Nikes instead of Christian Louboutins!" Simpson, who will serve as a "mentor" on the upcoming reality competition show "Fashion Star," tells the magazine in her signature Texas drawl. "If she ends up bein' this volleyball-playing, basketball-playing woman I'm looking up at! Eric is so athletic. We're gonna have this ath-a-letic girl and I won't even be able to take her shopping, 'cause all she's gonna want is sports bras and Nikes!"

[Related: omg! Interviews Pregnant Jessica Simpson: 'I'm More Confident Than I've Ever Been']

The Eric she's referring to is Simpson's fiancé, pro football player Eric Johnson … and the reason their future daughter could be one very large baby. (Her physician is predicting 10 pounds, the same size Johnson was at birth.) "Me, I was only six pounds," she says. "So maybe Eric and I can meet in the middle."

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The couple apparently didn't have any trouble meeting in the middle when it came to choosing a name for their baby girl. And the future mom insists they won't be changing their minds. "We're sure. We're embroidering it on things," Simpson insists of the name she describes as "nontraditional." "It's nothing shocking and nothing you'll have to add to the dictionary Still, when people hear it, they'll know…why."

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Jessica on the April cover (Carter Smith/ELLE)

And with the new baby will surely come more media attention, something Simpson is quite familiar with — explaining her elaborate tactics for shaking off the paparazzi, which involve renting multiple cars and switching them out in various parking garages. But it's not just the media's photographers who have caused trouble for a woman who started her music career as a teenager but rose to even more fame after her infamous reality show "The Newlyweds" debuted in 2003. The MTV series followed the star and then new-husband, former boy band member Nick Lachey (who, coincidentally just announced he and second wife Vanessa Minnillo are expecting, too), and often portrayed Simpson as less-than-the-brightest bulb. Case in point: When Simpson wondered aloud if Chicken of the Sea tuna was made from actual chicken.

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"The thing is, I was just a lot more naive in my life back then," she explains. "I was experiencing a lot of things for the first time, like media and marriage and just…comin' in to my own as a woman. I was this southern, Texas girl who didn't know much comin' into this world," she explains.

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One thing's for sure: Jessica Simpson is happy to be Jessica Simpson. "I know who I am, and you kinda' can't mess with that. I'm a go-with-it girl. I have a blast makin' fun of myself and falling on my face and then getting up again," she shares. "It's so much better than being the cool, deep, tortured artist."