Now that the feud between Taylor Swift and Kim Kardashian has gone from cold war to nuclear holocaust, dozens of celebrities have weighed in on the unexpected clash of the A-listers.
Of course, the one opinion that matters most when it comes to the competitive side of Ms. Swift is that of her longtime foe Katy Perry.
Katy threw some subtle shade at Taylor earlier this week while the rest of the Internet was reveling in her undoing.
To her credit, Katy didn't do too much gloating, and the temptation must have been hard to resist.
After all, it's not every day that your rival is exposed as a liar and trash-talked by millions of social media users.
But while she hasn't taken to the streets to celebrate, don't think for a second that Katy is anything less than thrilled with Taylor's latest PR crisis.
A source close to the situation tells Radar Online.
"Katy is so happy that someone finally put Taylor in her place."
And Katy, being the polite pop queen that she is, knew the proper etiquette to observe when someone slays one of your enemies for you:
“Katy called Kim personally to thank her after she saw the video exposing Taylor," the insider adds.
“She has dealt with Taylor’s high school mind games and lies for so long and she is so glad that Kim showed the world."
As for what caused the beef between the two singers?
Katy reportedly believes the whole thing about stealing backup dancers is BS cooked up by Swift's PR team.
She says at the end of the day the bad blood (hey!) all comes down to Katy's relationship with John Mayer.
The douchebag singer famously dated, broke up with, and got back together with Perry not long after briefly dating Taylor.
“Katy thinks that it all comes down to the fact that John wanted to be with her and not Taylor,” the source says.
“That is real reason Taylor brought up the drama about Katy stealing her dancers.”
Look what you've done, John Mayer!
Eh, we're sure it was totally worth it.