Last time we heard from Zayn and Naughty Boy, everything was hunky dory but it looks like that's all gone south, much to the delight of One Direction fans.

The former 1D member had been working with Naughty Boy since his departure from the group in March but it looks like that's gone down the Swannee now.

It started with this pretty direct piece of agro.

And continued with this.

The video that Zayn is referring to is this one, which features Zayn singing  apparently leaked over the weekend.

Naughty Boy for his part tweeted some thinly veiled subtweets which at this point we pretty much think were directed at Zayn.

One Direction fans have, in the meantime, lost their collective shit and gone on Twitter rampages that are entertaining at best and genuinely concerning for the human race at worst.