With all of the engagement buzz that had been swirling around Katy Perry and John Mayer lately, fans were kind of caught off-guard when news broke that they had called it quits.
We know the rumor mill can sometimes be hit or miss, but it generally doesn't strike out that badly.
So, what happened between the engagement buzz and the big breakup?
A source told Us Weekly that the musical duo hadn't exactly been seeing eye-to-eye lately. "She's stressed about the tour, they've been fighting," they revealed. "It is probably for the best, because she is going to be on tour for forever. Of course this happens all the time, I can't keep track anymore. But for now they are done."
E! News is reporting a similar story, citing a source that told them Katy's upcoming world tour might have been the last straw for the couple.
Interestingly enough, when the news broke, Katy was posting away about all the places she'll be visiting on the tour.
Subtle dig or just unfortunate Twitter timing? Our guess is the latter and if you watch the video above, you'll see why we say that.