The pop stars, who have been on and off for years, have reportedly called it quits for the fourth time.
An insider told E! News that the pair have gone their separate ways but Katy and John are yet to publicly comment on the matter.
Katy and John rekindled their relationship in January when they met up with each other for a romantic meal.
The news comes not long after Katy and John were seen looking very cosy together at a series of Grateful Dead farewell concerts in Chicago over 4 July weekend. “They were backstage being super sweet together – but not standing too close – in a big group of friends,” an onlooker told People.
The couple first started dating in 2012 and endured a series of breakups before calling things off in February 2014. Since then, they have continued to fuel relationship rumors with numerous outings together.
John has dated a number of famous women in the past, including Jennifer Aniston, Jessica Simpson and Taylor Swift. Perry has been in a long standing feud with Swift, which she recently fueled again with a tweet.