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COLOGNE, GERMANY - DECEMBER 20: Sophia Thomalla and Simone Thomalla attend the 'Let's Dance - Let's Christmas' Show on December 20, 2013 in Cologne, Germany. (Photo by Mathis Wienand/Getty Images)

COLOGNE, GERMANY - DECEMBER 20:  Sophia Thomalla and Simone Thomalla attend the 'Let's Dance - Let's Christmas' Show on December 20, 2013 in Cologne, Germany.  (Photo by Mathis Wienand/Getty Images)