Sia's put some of the writing and production credits for Britney's 'Perfume' on Twitter

Sia has revealed some more inform­a­tion about Britney's forth­com­ing single 'Perfume' via the medium of Twitter.

Apparently the song was co-produced by will.i.am and Chris Braide, the latter having also co-written (with Sia) Beyoncé's 'God Made You Beautiful' and Christina's 'Blank Page'.

Basically, we've just re-written her tweet, which you can find here.