Prabal Gurung arrives at the unveiling of &#39;Gaga&#39;s Workshop&#39; at Barneys New York on November 21.  Gaga teamed with Barneys New York to open &#39;Gaga&#39;s Workshop,&#39; which is a take on Santa&#39;s iconic and traditional workshop. The 25-year-old singer teamed with other creative talents to create a quirky holiday destination filled with exclusive products and festive holiday windows. Barneys New York is donating 25 percent of sales from the featured items to the Born This Way Foundation, recently founded and announced by Gaga and her mother.  &#40;Pictured: Prabal Gurung arrives at the unveiling of &#39;Gaga&#39;s Workshop&#39; at Barneys New York on November 21.&#41;  <span class=meta>(Jamie McCarthy)</span>
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