Louis Tomlinson is throwing more shade at Naughty Boy after the producer dissed the One Direction fandom and posted a Photo Booth selfie with Zayn Malik! It all started when Naughty Boy tweeted a pic with the Bradford Bad Boy, along with the caption, "Replace this." (He's referring to a video that Liam Payne posted, jokingly replacing their former bandmate.)

Then, Tommo responded by dissing the producer's use of Mac filters — which, we have to admit, is pretty old school.

The producer fought back by saying that the 1D guy can't sing! (Obviously, we know that's not true.)

In response, Louis chimed in with more sass.

Given that Naughty Boy has been dissing Directioners left and right, we're not surprised that Louis stepped in to defend his beloved fans. He's called out Zayn's BFF before, and fans are equally impressed that he's doing it again!

Are you surprised that their shade is escalating? Sound off in the comments!