LED lights form shapes of hearts on the exterior wall of Palais des Congres (Conference Palace) on Saint Valentines's Day in Paris, France, Feb. 14, 2013. Over 25,000 LED lights were used to decorate the walls of the Palais des Congres in Paris from Feb. 14 to 28 to celebrate the Saint Valentine's Day and call out care and love for children with heart disease. [Xinhua/Gao Jing]