Rihanna has not yet finished her upcoming new album, according to Sia.

The Australian singer and songwriter has previously worked with the Barbados star on the likes of 'Diamond'.

She is expected to release her eighth album 'Anti' soon - but it seems Rihanna is still scouring for material.

Sia told BBC Radio 2: "The other night she came over and listened to half of 25 songs I played her because she's still looking for songs for her new album.

"She was there to listen to songs and see if there was anything that she was into. It was a business meeting for sure. She took four [songs] but I don't know if they'll end up [on the album].

"I'm pretty sure I have one on the new album but I don't know if I'll end up with more than that."

Sia meanwhile will release her new album 'This Is Acting' on January 29 - a record of songs originally penned for other artists.

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