It's the feud that just won't die and the beef between pop queens Katy Perry and Taylor Swift has just been kicked up a notch.

Following her previous decision to remove all music from streaming service Spotify, today (June 9) saw Swift's full back catalogue re-released to the service to stream once more.

However, there's one catch... Recognise that date?

Yep, June 9 is actually the date Katy Perry's new album Witness launches, leaving some fans feeling that some major shade is going on here, suggesting Taylor may have orchestrated this whole thing as another dig at her long-time rival.

Here are all the best Twitter reactions making the case: