Bieber just got petty.
Justin Bieber is the latest celebrity to involve himself in the Kanye West-Taylor Swift beef, posting a seriously savage (and really, kinda petty) message to the pop-singer on Instagram.
The black and white post is a screen grab of Bieber face-timing Kanye West, but he's captioned the photo; "Taylor Swift what up"... We did say it was petty.
Of course, #taylorswiftwhatup began trending in minutes and people on Twitter are going in.
And just to top it off, Martin Garrix joined in...
In case you've been living under a rock, the Kanye/Taylor beef started when 'Ye included the lyric "I feel like me and Taylor might still have sex, I made that bitch famous" in his 'The Life Of Pablo' track, 'Famous.'
Kanye insisted Taylor had pre-approved the lyric, whilst Taylor insisted she had never heard it. Then, in an epic plot-twist, Kim Kardashian posted a video of Tay and 'Ye on the phone , in which you can clearly hear Taylor approving the lyric.
The drama continues.