Let's see:
Katheryn's shade to Taylor: a radio interview (about some artists being one trick pony).
John's shades to Taylor: a catty song, and that duet with Katheryn (giving her a full verse and how it makes him sound like a super gentle dude, 'broken bird with tortured soul.)
Do you, Taylor!
Katheryn, John, She's coming for you.
I guess there are two broken birds now!