It's over... again! Katy Perry and John Mayer 'end their relationship' for a second time

John Mayer and Katy Perry have reportedly ended their relationship for a second time.
The couple split briefly in August before reconciling the following month, but have allegedly called it quits once again.
Multiple sources have confirmed the break up, it has been reported by Us Weekly.

Calling it quits: John Mayer and Katy Perry, pictured earlier this month, have reportedly ended their relationship for a second time

Once source told the publication that 'it's sad,' but suggested it may not be a permanent end for the two singers.
'It's not over until it's over. You have to see how things play out,' the insider added.
Another source claimed: 'She's leaving the window open. They have both been so focused on work.'

Rocky: The couple, seen here last month, broke up briefly in August before reconciling but have now split again

Katy, whose divorce from Russell Brand was finalised in July, began dating the infamous lothario that same summer.
The 28-year-old pop star has been busy recording her third studio album of late, while John is preparing for tour dates later this month.
The pair were spotted together earlier this month enjoying a hike with Girls star Allison Williams and her boyfriend in the Hollywood Hills.

Gym bunny: The pop star was seen making her way to the gym in Los Angeles in Saturday

Things seemed to be going great with the pair as on March 2 Katy tweeted: 'My boyfriend is taking me to a kitten shelter in his truck. I can't think of a more perfect Saturday.'
John told CBS last month: 'For the first time in my life I don't feel like I'm in a celebrity relationship. I really don't. I'm not in a high profile - I know it's high profile,' Mayer said in the televised interview.
'Doesn't' feel that way to me. And great! I'm glad... For me, it feels like something that's very human.'

Taking a brief break?: Sources have suggested that Katy and John, pictured together on Valentine's Day, may not be over for good

His past girlfriends include the likes of Taylor Swift, Jennifer Aniston, Minka Kelly and Jessica Simpson.
It's another blow for Katy, after ex-husband Russell mocked their short-lived marriage on an XFM radio show on Monday night.
After pals Noel Gallagher and Matt Morgan made jibes about the 14-month marriage, complete with lots of giggles, Russell said: 'Don't cackle I tried my hardest. How come you know exactly how long my marriage was. Was you timing it?'

Summer loving: The pair began dating in the summer of last year, and Katy's marriage to Russell Brand was finalised in July

Noel then chimed in and said: 'For the record, in the sweepstake I came the closest.'
Russell shot back: 'Thanks, nice to know you're all behind me, very supportive, nice to know you're all supporting me.'
Then, joining in with the jokes, the comedian added: 'Let me tell you a thing about marriage. Marriage is a bond that can last up to 14 months... This is a sacred 14-month arrangement. Begins on an elephant. Ends in a newspaper.'

Making a mockery: Russell Brand poked fun at his marriage to Katy on an XFM radio show on Monday