My family and I went chalet when I was young. The chalet was big. 4 bedroom. One night we heard song coming out of one bed room. That bedroom was empty. I went in to check, no noise, nobody. It strange. I never tell my family until the next day. (Memory collected at the Cheng San Public Library during the "irememberGhost stories" campaign from 27 Sep to 30 Nov 2012)