Rihanna's best friend Melissa Forde has landed in hot water after making a racist slur against Chris Brown's ex-girlfriend Karrueche Tran.
Melissa Forde defended her superstar pal from fans of Chris Brown's ex - who is of Vietnamese origin on Twitter.
But she has reignited the war of words between the two camps after using the term 'rice cake' to describe Karreuche, who is of Vietnamese origin.
Forde was telling a fan of Tran that it was okay not to like Rihanna but that she shouldn't insult her best friend before it all got a little too heated.
In the Instagram rant, she wrote: 'I get that you don’t like my Bfff and trust you don’t have to cause the one thing you not liking us will do is stop anything from moving forward!!
'You can be rice cake’s friend I don’t give a f***, but keep up all this disrespectful talk and while your fake profile having azz is typing on instagram MEE Melissa T Forde will be the one knocking on your door asking you to come talk face to face!'
She had also earlier tweeted: 'Every single one of y’all b*tchez are soo f*****g dumb and obviously have nothing better to do. But lets be VERYYY clear about one thing, nobody gives a rats a** about whatever the f*** her name is… so be careful how you talk about my BFFF!! A n***a will always do what [HE] wants!!'
Possibly sensing trouble, Rihanna tweeted to her friend: 'Melissa T Fooooorde! Stop it!!!'
Forde has been friends with Rihanna for years, and has reportedly known her since childhood.
It comes after the same term fuelled a huge Twitter war of words between Rihanna and Karreuche earlier this year.
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 was widely perceived as a jibe at Tran, who was dating Brown at the time.
And Rihanna's remixed song Birthday Cake, featured sexually explicit lyrics: '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.'
Rihanna is reportedly dating Chris Brown again - just weeks after the rapper finished his relationship with Tran.
And it seems Chris is not very happy with the situation.
He posted a sulky picture of himself, and tweeted: 'Feeling like s**t today!'