Katy Perry has explained how she ended her feud with Calvin Harris to record her hit song Feels

‘It was time to put that all behind us’

We all remember Katy Perry and Calvin Harris’ very public Twitter spat – and at the time we weren’t surprised, given that Calvin's ex girlfriend Taylor Swift has been feuding with the I Kissed A Girl singer for as long as we can remember.

We were surprised however, when Katy and Calvin released the hit song Feels together earlier this year, leading fans to question whether the two had put their disagreement behind them.

The argument started back in 2011 when Calvin Harris, scheduled to open for Katy’s gig, cancelled last minute due to set arrangements.

‘Calvin Harris will NOT be joining in on the fun and has CANCELLED last minute,’ Katy posted to her millions of Twitter followers, prompting the DJ to make a public response.

‘Sorry to all who wanted to see me with Katy - her team suddenly moved the goalposts and I was to appear on stage with no production,’ Calvin replied on his own Twitter account, to which Katy replied, ‘The goalpost seemed to be perfectly fine for New Young Pony Club, Yelle, Robyn, Marina & The Diamonds, to name a few.’

She continued: ‘It’s fine, I’m used to you cancelling on me, it’s become ur staple!’ (sic)

The fall out seemed permanent at the time, but Katy Perry revealed just this week that the two made up when making their new song.

'We’d had little falling outs here and there. We’d had some public Twitter spats but it was time to put all that behind us,' the 32-year-old singer explained.

'We just bumped into each other and he said, "I think I have a song that you should come check out,"’ she continued. 'I was like "cool" because we had always meant to work together for years and years and years. I came to the studio and he played me a bunch of unfinished but really solid moments for his new record.’

‘Then he played me this one part for this new song called Feels and I was like "Oh yeah", she explained. ‘This is like my favorite song off the record. I was just down to do it. I’ve always wanted to collaborate with him for years and years and years.'

If Calvin and Katy can put their differences between them, maybe there's hope for a Katy-Taylor friendship.