Natalia Klitschko, the wife of Kiev mayor Vitali Klitschko, spoke and sang to thousands of people at a peace demonstration organized by artists in Berlin on Sunday, stressing that the world had to stand together for peace in Ukraine. “What is happening to my country now is terrible,” she told the crowds assembled at Berlin’s Brandenburg Gate. “It is important to see the masses that are gathered here. It is important to see that the whole world is standing for Ukraine.” The musician then announced that she had a new song for her country, before performing her track “Better days.” By early eveni…