Justin Bieber to Selena Gomez: You Boned Zayn Malik, Cheater!

It's. About. To. Go. Down. Grab a hat and hold the f--k onto it. 

Just when fans thought Justin Bieber and Selena Gomez’s newly-rekindled beef couldn't possibly get any uglier on Instagram ... well $h!t.

If this report is to be believed, we may just be getting started.

The douchey pop singer apparently accused his ex-girlfriend of cheating on him with Zayn Malik in the latest salvo fired in their feud.

First, let's take a step back and recap how we got this far:

Bieber threatened fans that he would make his Instagram account private if they continued to attack his new girlfriend, Sofia Richie.

Gomez, evidently feeling like getting some attention and causing a $h!tstorm online, then interjected and threw shade in the comments.

Seriously.

Yes, Gomez called out Bieber for not keeping his private life private ... then stated thatJustin cheated on Selena during their relationship.  

“Funny how the ones that cheated multiple times, are pointing the finger at the ones that were forgiving and supportive," she wrote.

"No wonder fans are mad. Sad. All love."

The authenticity of these messages is up for debate, but they quickly spread online as the hashtag #SelenaEndedJustinParty started.

Now, Bieber is firing back at his ex, accusing Gomez of cheating on him - with none other than former One Direction singer Zayn Malik.

“I cheated /.. oh I forgot about You and Zayn?” Bieber reportedly shot back, according to the latest round of screen shots going viral.

"It's funny to see people that used me for attention and still try to point the finger this way. Sad. All love," Bieber's initial reply to her said.

"I’m not one for anyone receiving hate. Hope u all can be kind to my friends and each other. And yes I love my beliebers."

Again, it's still in dispute whether this Instagram feud did, in fact, happen; Gomez and Bieber have yet to deny that it has, but nevertheless.

Selena notably joked (but not really) that she was crushing on Malik - who's dating model Gigi Hadid - in an interview early this year.

“If he had asked me out on a date, I would be seen with him,” the Disney alum told InStyle UK in January. “Just kidding, but not kidding.” 

All we can say for sure is this:

We really hope a fake Zayn Malik chimes in on Instagram and accuses both Justin and Selena of cheating on each other with Harry Styles.