Katy Perry & John Mayer

They’ve always had a tumultuous relationship and now it seems Katy Perry and John Mayer have called it quits on their romance once again.

While details are still scarce, an inside source told E! News that the “Roar” songstress kicked her “No Such Thing” beau to the curb over the course of the past week.

To that end, John didn’t accompany Katy to London and Milan earlier this month despite earlier rumors of a secret engagement.

Perry guest sang on Mayer’s single “Who You Love,” and the two really seemed to have moved past their on/off tendencies.

In a previous interview, Katy gushed, “I’ve been a fan of John’s for years before I got to actually kiss him. I’ve been such a fan, I think he’s so incredibly talented and gifted and a genius songwriter. So to be a part of anything he was doing was just natural.”