The annual tree-lighting ceremony in Wiscasset will take place at 4:30 p.m., Saturday, Dec. 3 on the town common. There will be a sing-along of familiar holiday songs, led by chorus members from grades five through 12. Cocoa and sweet treats will be served near the top of the town common after the lighting of the Norway spruce tree. This event has become a tradition in Wiscasset and ushers in the holiday season in this coastal town.