The Taylor Swift-Katy Perry feud continues, and this time, Taylor decided to take a jab. But before we go further, let's talk some history first. The whole thing started during Swift's RED tour, when dancers left mid-way to join Perry's PRISM World Tour.

It's all business?

That's what inspired Taylor to write that horrible song 'Bad Blood.'

Weirdly, it was nominated for video of the year, then Nicki Minaj got upset.

Katy Perry was probably like...

Of course, Katy Perry decided to say some things.

When Taylor wrote Bad Blood, and made that video, Katy decided to diss Taylor in a subtle way with her left and right shark.

Last night, Swift's concert had a "Left Shark" cameo.

Was it a jab at Katy Perry?