Katy Perry and John Mayer have called it quits for a second time! The pair who initially started dating in the summer of 2012 briefly split in August but reconciled just one month later. Well apparently they hit the six month itch! A source confirmed they have parted ways yet again, but hinted that it may not be permanent! Will the third time be the charm for these two singers?! Guess we'll wait and see, but both Katy and John are busy with their own music careers.