The 25-year-old, whose "Bad Blood" video scored a nom, mistakenly thought the message was a dig at her but has since apologized for the misunderstanding.
But that didn't stop Taylor's former pal Katy from giving her two cents about the whole fight!
"Finding it ironic to parade the pit women against other women argument about as one unmeasurably capitalizes on the take down of a woman…" the "Roar" singer wrote to her followers on Wednesday, referring to Swift bashing her via "Bad Blood."
And it looks like one celeb couldn't help but agree with the pop star's bold statement.
Actress Camilla Belle retweeted Katy's message and chimed in with her own thoughts. "Couldn't have said it better…" she wrote
In case you didn't know, T.Swift and the 28-year-old also have some beef, after the "Sundown" actress dated Taylor's ex Joe Jonas in 2009. The star famously slammed Belle in her 2010 song "Better for Revenge" for hooking up with the former Jonas Brother shortly after their split.
"I never saw it coming, wouldn't have suspected it / I underestimated just who I was dealing with," Swift sings. "She had to know the pain was beating on me like a drum / She underestimated just who she was stealing from."
That's not all. Taylor also alleged that the unnamed "actress" not only stole her boyfriend but is better known for "the things she does on a mattress."