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If you are wondering what the #TaylorSwiftWhatUp hashtag is all about, enter Justin Bieber who has immersed himself in the latest Kanye West-Taylor Swift feud by throwing some major shade Swift’s way.

The Biebs took to Instagram Tuesday morning with a screengrab of himself FaceTiming West. The image seemed innocent enough but his caption served as the jab heard around the internet.

“Taylor swift what up,” Bieber captioned the pic.

The “Sorry” singer and the “Bad Blood” songstress aren’t exactly besties, which stems from Bieber’s past relationship with Selena Gomez. Therefore, it’s really no surprise that Bieber would side with the rapper in the feud over what Swift knew or didn’t know about the lyrics to Kanye’s song “Famous.” But, we had no idea he would do it in such a public way.

Now, we’ll just have to wait and see if Swift responds.