&#39;Macy&#39;s Stars of Dance&#39; troupe performs its fourth installment, which was choreographed by Allison Holker and Stephen &#39;tWitch&#39; Boss, on &#39;Dancing With The Stars: The Results Show&#39; on April 30, 2013. The dance is accompanied by violinist and YouTube sensation Lindsey Stirling. <span class=meta>(ABC Photo&#47; Adam Taylor)</span>
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