Quite good songwriter and singer in her own right Sia has tweeted something exciting about Mutya Keisha Siobhan.
@mksofficial Holy shit! You just killed that vocal!
— sia furler (@Sia) April 2, 2013
See, we told you.
We sort of assumed their collaboration was finished when they were in LA last month, so maybe this means Sia's just heard a finished song.
Mind you, it could be a mash-up or some remix involving Dev. WHO KNOWS.