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"An a cappella cover of Taylor Swift&amp;#039;s &amp;#039;I Knew You Were Trouble&amp;#039; has gone viral on the internet. Performed by Walk Off the Earth and featuring KRNFX, the group features vocalist Sarah Blackwood singing Swift&amp;#039;s part, supported by backing vocals and some beatboxing.      The cover has been a huge hit, with more than 800,000 views on YouTube. Over 37,000 users have &amp;#039;liked&amp;#039; the Canadian group&amp;#039;s video, which was uploaded on New Year&amp;#039;s Day. One YouTube commenter posted: &amp;quot;Love this! Can they forever replace Taylor\u00EF\u00BB\u00BF Swift?&amp;quot; Another said: &amp;quot;This is the best cover I&amp;#039;ve ever seen of anything by anyone.&amp;quot; &amp;gt; Man covers pop songs on violin: Justin Bieber, Ellie Goulding, more &amp;gt; &amp;#039;Call Me Maybe&amp;#039;, &amp;#039;Call Me&amp;#039; mash-up acoustic cover - watch Listen to the original song by Taylor Swift below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/fun/news/a448273/taylor-swift-i-knew-you-were-trouble-a-cappella-cover-watch/>