29 November 2012, 11:44
The track's songwriter performed the track in front of an audience at the Norwegian-American Achievement Awards.
Sia was seen covering Rihanna's smash hit single 'Diamonds' this week at an awards ceremony in Norway.
The Australian star was the one who penned the track for the Bajan star alongside the Stargate production team.
The performance took place at the Norwegian-American Achievement Awards this week and comes shortly after Kanye West unveiled his remix of the track.
The lyrics of the song were also featured in Adele's first Twitter post since she gave birth to her first child – as she thanked funs for helping her achieve ten million sales of her album '21' in the US.
Sia has also most recently teamed up with the likes of David Guetta for 'She Wolf' and also provided vocals on Flo Rida's hit single 'Wild Ones'.
Watch Sia performing Rihanna's 'Diamonds' below:
Meanwhile, the track has claimed its second week at the top of the Billboard Hot 100 40 this week giving the singer a number one on the singles and albums chart in the US.
'Unapologetic' is also the singer's first ever album to shoot straight to the top of the charts across the pond.