Katy Perry was reportedly left fuming after her Twitter was hacked into by music producer Dr. Luke, real name Lukasz Gottwald.

Katy had a series of messages posted on her account about her sexual health and incontinence.

The feud began after Gottwald wrote: “is it normal to have the reacurent rash with blisters on my vagina??? (sic)”

Responding to the post, Perry said: “@thedoctorluke …um you mean RECURRENT? Idiot. THIS IS WAR!!!!!!!!!!!!!!! (sic)”

The producer then wrote another message: “oops i cr***ed my pants! it’s messy. what should i do? (sic)”

Perry later replied: “I’ve been twitter bombed while playing a game of ping pong… damn (sic)

“STOP HACKING MY TWITTER @THEDOCTORLUKE I’M GONNA COME HARD WITH IT WHEN YOU’RE SLEEPING A*SWIPE!”

Her last post read: “I’m signing out now….sorry mum.”