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Zayn Malik, Naughty Boy

Karwai Tang/WireImage

#ZAYNHASNOCHILL has been a top trending topic on Twitter Monday because, well...Zayn Malik isn't exactly playing it cool when it comes to this feud with Naughty Boy.

The former One Direction boy-bander slammed the producer (real name: Shahid Khan) after Naughty Boy uploaded unfinished music video footage to Snapchat Sunday. The clip, an excerpt from Zayn's cover of Rae Sremmurd's "No Type," shows the 22-year-old singer crooning in collaboration with hip-hop duo Krept & Konan.

Zayn was not happy about the leak, and he wanted to make sure the Twitterverse was well aware. "@NaughtyBoyMusic you fat joke stop pretending we're friends," he tweeted. "No one knows you."

"Someone learned how to upload a video," Zayn posted about an hour later. "maybe now he should learn how to use logic ha you ain't s--t but a faker."

 Naughty Boy has yet to publicly respond to Zayn's tweets, but he did post some rather ominous, potentially telling messages of his own on Saturday.

"this 'music' business teaches you the tricks but never the truth," he wrote. "you know who you are."

Later, Naughty Boy added, "don't bite the hand that feeds you."

Oy. It seems that Zayn's solo career is getting off to a bit of a rocky start. One Direction's remaining members, however, seem to be moving forward musically just fine without their fifth bandmate.

Harry Styles, Louis Tomlinson, Liam Payne and Niall Horan performed their first American concert as a foursome last week in San Diego, and aside from one cutie taking a tumble onstage, everything went off without a hitch.