If you're chomping at the bit for Rihanna's new album 'Anti' - which has been rumoured for release several times this year, but has yet to surface - make yourself comfortable, because you may have a wait on your hands.

That's at least according to Sia, who says that the star has yet to finish her 8th album. Unless she's trying to throw people off the scent and Rihanna's going to pull a surprise-release this side of Christmas, that is...

Sia, however, told Jo Whiley on BBC Radio 2 that the tracklisting was incomplete. "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 said. "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, but I don't know if they'll end up..."

Sia, on the other hand, releases her new album 'This is Acting' next month.

Get the finger out, Ri-Ri.