Katy Perry receives apology from Calvin Harris

Calvin Harris has apologised to Katy Perry after the pair became embroiled in a Twitter row.

The Scottish DJ said sorry to the 'Firework' singer over the micro-blogging site for pulling out of her UK tour and airing his opinions in such a public forum.

"I am really sorry Katy Perry, I'm just upset because I really wanted to play but ur (sic) team made it impossible,' he tweeted.

'We tried really hard to sort it out, but playing side of stage for 30 mins, it seemed pointless me even being there. Didn't intend to cause offence or upset anybody.'

Harris was scheduled to support Katy in Dublin on Monday night (28.03) but it was left to Perry to tell fans it wasn't happening.

The Scottish DJ criticised her production crew on Twitter which resulted in a war of words between the two.

The feud also sparked an angry reaction from Katy's fans. 

'Wtf (what the f***) are Katy Perry fans telling me to kill myself on Twitter for?' Harris wrote, hitting back.

'Seriously. I'm a producer making music. Leave me alone please thanks... The internet is a really depressing place sometimes.

He continued: 'The whole KP (Katy Perry) stuff shd (should) never have been on Twitter, I was trying 2 (sic) handle it pro (professionally) behind the scenes but I won't let myself get ripped (criticised) like that.'