The two singers were once good pals, however after that feud and Taylor’s scathing song ‘Bad Blood’ - which is allegedly about Katy - their friendship came to an end.
Now, Taylor is the hot topic of conversation once again, thanks to the fact Kim Kardashian has released a video of her speaking to Kanye about his controversial ‘Famous’ lyrics, and Katy appears to have responded in a delightfully low-key way, while also managing to give her latest single some promo:
Nicely done, Katy.
This is the second time in as many weeks that Katy has responded to incidents involving Taylor.
Last week, she offered a suitably sassy - yet classy - comeback, when Calvin Harris name-checked her in a string of tweets about his ex-girlfriend.
He wrote: “I know you’re off tour and you need someone new to try and bury like Katy ETC but I’m not that guy, sorry. I won’t allow it.”
Meanwhile, Taylor has hit back at Kim for posting the video on Snapchat, with her own statement on Twitter.
Your move, Kim…
Tap the image below to launch the slideshow.