Rihanna rejected a song provided by Sia and Adele.

The ‘FourFiveSeconds’ singer, 27, currently is working on her eighth studio album but declined a track co-compiled by the superstars despite their incredible writing credentials.

Sia, 39, – who’s got already released ‘Alive’ which she also penned with Adele – said: “We wrote three songs into two days and undertake and don’t made the cut and this also was one too.

“I believed to [Adele], ‘Do you mind if I pitch it to, say, Rihanna?’ And she said, ‘Yeah, but sometimes you take my vocal off it because I don’t want my vocal going swimming out there using a demo’.

“So I went and re-cut the vocal and everybody around my life was like, ‘You can’t give this away to anybody’.”

Despite others insisting she kept the track for herself, she offered it to Rihanna to be with her new album ‘Anti’ but doesn’t think it had been “edgy” enough on her.

She told Ryan Seacrest: “Well actually I believe she did [get the chance to consider it] and he or she passed.

“We sent it to her, but it is not really her so I are not aware of why I thought that. It is a smash, but she’s a bit more edgy.”

The track – titled ‘Bird Set Free’ – can appear on Sia’s seventh album ‘This is Acting’ as a result of be released in January.