Here we go again! One mere month after John Mayer gave Katy Perry a $46,000 (yet somehow still cheap looking) ring for Valentine’s Day, the two have reportedly called it quits … for the second time. This most recent breakup actually comes as a shock to me because although the two started dating last August (as the perfectly gross couple) and broke up for the first time two months later, they quickly got back together again. Then things supposedly got serious with John dressing as gross-sexy Santa and visiting Katy’s family for Christmas. John also bragged to Rolling Stone about their wonderful relationship: “I’m quite happy. I’m happy in all aspects of my life. I’m very happy in all aspects of my life.” I honestly thought they’d make it to at least a year together before breaking up again because Katy’s wilful douche-blindness seemed semi-permanent, but now it’s over all over again:

Katy Perry and John Mayer have once again said goodbye — for now. The pop songstress, 28, and singer-songwriter, 35, have split for the second time, multiple sources confirm to Us Weekly. The high-profile pair began casually dating during summer 2012, and briefly called it quits back in August before reconciling the next month.

“It’s sad,” one pal tells Us, but cautions that it might not be a permanent break. “It’s not over until it’s over. You have to see how things play out.” Adds another source: “She’s leaving the window open. They have both been so focused on work.”

Indeed, Perry has been busy recording her third studio album in Los Angeles, while Mayer — on the mend following serious vocal problems and throat surgery last year — is prepping for upcoming tour dates and a live Google Hangout chat this Thursday, March 21.

Following their September 2012 reconciliation, the twosome seemed to ramp up their relationship: The “Waiting on the World to Change” troubadour visited Perry’s Santa Barbara hometown in November, they attended high-profile events together as a couple, and Mayer, famous for his string of A-list exes, gushed about Perry in a January 60 Minutes interview. “I’m very happy in all aspects of my life,” said Mayer, who had messy splits with the likes of Jennifer Aniston, Jessica Simpson and Jennifer Love Hewitt, to name a few.

Perry, who finalized her divorce from Russell Brand in February 2012, was tweeting happily about her man as recently as March 2. “My boyfriend is taking me to a kitten shelter in his truck,” she wrote to her nearly 34 million followers. “I can’t think of a more perfect Saturday.” But on Monday, March 18, she suggested she’s been dealing with turmoil. “ATTENTION: Mercury is OUT of retrograde today. Thank GOD,” Perry wrote.

[From Us Weekly]

Naturally, I’m guessing that John probably did this relationship in by cheating on Katy, and she found out about it. There have been buzzings all along that he’s been getting some on the side with sex dates from the very beginning. Of course, the source tells Us that this upheaval in their romance has everything to do with mutual busy schedules, but — let’s face it — John is not relationship material, and Katy knew it but signed up for it anyway because she wanted to change him. I’d feel bad for Katy, but she must have been aware of John’s reputation before going there.

Meanwhile, Katy is still trying to quietly unload the $6.5 million estate that she bought with Russell Brand even though neither one of them oficially ever moved into the home. For his part, Russell has let slip on an Xfm radio program that he and Katy’s “marriage was shaky from the get-go.” Poor Katy — she really needs to take some time out from relationships because she keeps on picking the wrong dudes for her.

Here’s some photos of Katy at her gym in Beverly Hills over the weekend.

Photos courtesy of Fame/Flynet