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.
Justin: "Taylor Swift what's up"
-- *katy perry (@KatysPrismLight) August 2, 2016
-- ? (@jusxtinrauhls) August 2, 2016
-- Rory (@biebergirljdb) August 2, 2016
-- Lauren (@lolslack) August 2, 2016
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.
-- Team Bieber (@BixberNavy) August 2, 2016
-- Horchata luxx (@EliseoSauceda) August 2, 2016
And the feud doesn't look like it's going away any time soon.