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The pair - who recently released new single, Boyz - hit back on Instagram over allegations that Jesy had been 'blackfishing' in the track's music video.
Blackfishing is a term which describes a white person taking on black cultural references for their own gain.
You can watch a clip of the live below:
But the conversation turned sour after Nicki also called Leigh-Anne a "clown" for allegedly messaging a TikToker over the weekend about Jesy's 'blackfishing'.
"You don't have to come out and try to ruin anyone," Nicki said. "Let her [Jesy] have her time. If you was in this woman's group and you ain't talk about this sh*t for 10 years and as soon as you see she's got a video coming out with Nicki Minaj and Puffy now you're sending the stations text messages and all this sh*t."
Now, Little Mix fans are calling for people to 'be kind' to Leigh-Anne following the live.
One person wrote: "The fact that you’re talking about bullying someone and you literally did the SAME toward Leigh anne doesn’t sit right with me."
While another said: "I pray for leigh anne’s mental health she does not deserve any of this."
And a third added: "Leigh-Anne, I love you so much. You’re so incredibly talented and beautiful and so so kind, you deserve all the happiness and kindness the world has to offer. Stay strong, we love you so much."
It wasn't just Jesy's skin-tone that got tongues wagging in the Boyz video, it was also the song's lyrics, and her accent, which some claimed was put on.
Speaking on blackfishing allegations, Jesy told Vulture: “The whole time I was in Little Mix I never got any of that.
"And then I came out of [the band] and people all of a sudden were saying it. I wasn’t on social media around that time, so I let my team [deal with it], because that was when I’d just left.
“But I mean, like, I love Black culture. I love Black music. That’s all I know; it’s what I grew up on. I’m very aware that I’m a white British woman; I’ve never said that I wasn’t."
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