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"Sia has performed her version of Rihanna&amp;#039;s &amp;#039;Diamonds&amp;#039;. The New Zealand songwriter penned the hit for the Bajan star, but performed her own rendition of the track at the Norwegian-American Achievement Award ceremony.      Sia sang the track at an intimate venue earlier this week (November 28) and was accompanied by producers Stargate. The singer-songwriter has featured on and written some of the biggest chart hits over the past few years, including &amp;#039;Titanium&amp;#039; with David Guetta and &amp;#039;Wild Ones&amp;#039; with Flo Rida. The star recently revealed that her latest single with David Guetta, &amp;#039;She Wolf (Falling to Pieces)&amp;#039;, was written with Cher in mind. Rihanna&amp;#039;s &amp;#039;Diamonds&amp;#039; has reached number one in the UK and US since its release back in October. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/music/news/a441729/sia-performs-rihanna-hit-diamonds-watch/>