Woah. Twitter BLEW UP last night when Calvin Harris threw major shade at his ex-girlfriend Taylor Harris.
And it was surely only a matter of time until Katy Perry stuck her two cents in.
It was!
While not directly referencing the Tay-Tay vs. Scottish fitlord fight, it seems pretty clear to us that Katy retweeting her own tweet from 2015 is aimed pretty squarely at it.
"Time, the ultimate truth teller," Katy said.
She also posted a GIF of Hilary Clinton doing a real 'told you so' kinda move.
Calvin had referenced Katy in his tirade against Taylor, saying: "I know you're off tour and you need someone new to try and bury like Katy ETC but I'm not that guy, sorry. I won't allow it."
Katy and Taylor have been a-feuding since Taylor seemed to accuse Katy of trying to poach her backing dancers before Tay's tour, and it's widely assumed that Bad Blood is about the spat.
The pair were once close – Katy even guest performed at one of Taylor’s shows – but their friendship hit a rocky patch when Katy started dating Tay-Tay’s ex John Mayer.
And now Calvin appears to be accusing Taylor of trying to diss him in a similar way.
Calvin took umbrage when Tay's people claimed that she'd written This Is What You Came For.
Calvin posted on Twitter: "I wrote the music, produced the song, arranged it and cut the vocals though. And initially she wanted it kept secret, hence the pseudonym."
And: "Hurtful to me at this point that her and her team would go so far out of their way to try and make ME look bad at this stage though ."
What will Tay say? We can hardly wait to find out.