Gary Barlow wrote 'Sing' as a pop song, so it would represent what he stands for.

The Take That hitmaker wrote the track to celebrate Britain's Queen Elizabeth's Diamond Jubilee with Andrew Lloyd Webber, and although he had initially thought they would write an instrumental, changed his mind to reflect the pop music he has built his career on.

He told BANG showbiz: ''Initially I thought it was going to be an instrumental piece of music. And then I thought, 'Well, that just doesn't represent me, I write pop songs that have melody and lyrics.'

''So when I hooked up with Andrew I was hopeful it would be half decent. I think if you were to say our two names and play that song I don't think you'd expect that to come from it.''

He also said the collaboration came together quite naturally with himself and Andrew both writing different sections.

Gary added: ''It was one of those situations where I actually brought the chorus with me and Andrew had the verse and we just weaved the two into one.

''We spent a day doing that and then just emailed and emailed about the story of the song and what it should say.''

Gary worked with a number of musicians from across the Commonwealth of Nations - which includes Australia, South Africa, and India, among many others - as well as the Military Wives choir on the track, which even features the Queen's grandson, Prince Harry, on tambourine.

'Sing' is released on May 28.