If you're not in the know, Sia, Benny Blanco and the production team Stargate had written Rihanna's megahit single "Diamonds." It supposedly took Sia "22 minutes to write the lyrics and 26 minutes to record the full demo." Regardless of how the process went, she went on to write a big hit from Rihanna - it wen #1 on the U.S. Billboard Singles Charts. So on top of writing it, she also performed it at the Norwegian-American Achievement Awards. If you liked Rihanna's version, wait until you hear Sia's vocals. She performs it beautifully if not more powerful than Rihanna herself.
Watch the performance below:
Watch her speak about the writing process below: