WATCH: Sia Sings "Diamonds"

WATCH: Sia Sings "Diamonds"

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.

Tags: Popnography

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