WATCH: Sia Sings "Diamonds"

11.29.2012

By Jeremy Kinser

The Rihanna blockbuster is performed live by the woman who wrote it.

Rihanna's haunting latest single "Diamonds" is currently perched at the top of the pop charts. Sia, who cowrote the introspective ballad with Benny Blanco, performed her rendition last night at the Norweigan-American Achievement Award ceremony. Watch the performance below.