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NEW YORK, NY - DECEMBER 11: Singer Kirstie Maldonado of music group Pentatonix performs during the Z100 & Coca Cola All Access Lounge at Hammerstein Ballroom on December 11, 2015 in New York City. (Photo by Paul Zimmerman/WireImage)

NEW YORK, NY - DECEMBER 11:  Singer Kirstie Maldonado of music group Pentatonix performs during the Z100 & Coca Cola All Access Lounge at Hammerstein Ballroom on December 11, 2015 in New York City. (Photo by Paul Zimmerman/WireImage)