Sia only released an album to get out of her record contract.

The 'Chandelier' hitmaker hates being in the spotlight and prefers writing for other artists but brought out a well-received solo album '1000 Forms of Fear' last year purely because it was in the terms of her publishing deal.

She explained: ''Basically, I put this out to get out of my publishing deal.

''I was planning to be a pop songwriter for other artists, but my publishing deal was as an artist, so I had to put one more album out.

''I didn't want to get famous, so I just kept all the songs I wanted and had a lot of fun making it.''

And though she only made the record to fulfil her obligations, the 39-year-old singer - who has penned tracks for the likes of Beyoncé and Rihanna - admitted she already has another record ready for release, containing music originally written for other people.

She told NME magazine: ''I'm super-productive. I have a full album ready to go and it's much more pop. I'm calling it 'This is Acting' because they are songs I was writing for other people, so I didn't go in thinking, 'This is something I would say'.

''It's more like play-acting. It's fun.''