Nicki Minaj appeared to launch a fierce attack on Little Mix's Leigh-Anne Pinnock in an Instagram Live with Jesy Nelson last night.
Nelson quit the girl group after nine years last December citing mental health issues and is now embarking on a solo career, teaming up with Minaj and P Diddy for debut single 'Boyz'.
The video for the song courted some controversy over Nelson's appearance, however, with some fans accusing her of "blackfishing" - a practice where a non-black person attempts to appear to be black.
Following the furore, reports emerged via unverified leaked text messages that Pinnock had warned Nelson that she could be perceived to be blackfishing during her time in Little Mix - although the claims have not been confirmed.
Nevertheless, Minaj took aim at Pinnock in an Instagram Live with Nelson, who was accused by fans of appearing to laugh along as the US rapper mocked her former bandmate.
"Unless someone is pretending they're a race they're not and lying, sweetheart, take them text messages and shove them up your fucking ass because when you do clown shit I have to speak to you and talk to you like you're a clown," she ranted.
"You don't have to try and ruin anyone - you're in this woman's group and don't talk about this shit for 10 years and now you've seen she has a video coming with Diddy? Print those text messages out and shove them up your ass.
"If you want a solo career, just say that - you can go out and do your own music, you don't have to attack someone else. It screams insecurity, you're jealous - only jealous people do things like this, and now you look like a big, jealous Bozo."
Nelson or Pinnock have yet to directly comment on Minaj's rant.