It is widely known at this stage, that Taylor Swift and Katy Perry have this outrageous on going feud, and it has even been said that Taylor's song 'bad blood' is about the singer. 

We're not even fully sure what the drama is all about, but it has been reported that it all started when Katy stole back up dancers from Taylor. 

Our real question is why were the dancers so eager to leave Taylor for Katy? But that's for another day. 

Nicki Minaj also got involved as her and Taylor exchanged words over Twitter, Taylor apologised and the gals made friends again, but it doesn't seem the same is true for Taylor and Katy. 

During her performance of Bad Blood at a concert in Massachusetts over the weekend, Taylor was joined on stage by a very special guest… Left shark!

Katy famously danced with two sharks at the super bowl last year, and the guy on the left gained serious popularity as he was spotted getting his dance moves wrong. 

Well Taylor just threw some serious shade at Katy being joined by a shark on stage at her gig but fans thought it was immature. 

Some people would rather they just had it out and got it over with already… 

According to some, it was just down right childish… 

While others didn't take it too seriously and saw the funny side…