Justin Bieber has made a sly dig at Taylor Swift on his Instagram account and sent fans into a frenzy.
The singer uploaded a screenshot of an apparent video call between him and Kanye West with the caption: "Taylor swift what up".
The phrase started trending on Twitter straight away as people began to digest and react to the news with a selection of perfect gifs and memes.
Swift has been embroiled in drama with Kim Kardashian and Kanye West over his song Famous, and whether she approved the lyrics relating to her or not.
And the feud doesn't look like it's going away any time soon.