Swedish music icons ABBA have teased they are releasing new music for the first time in nearly 40 years. They shared the information on a website which went live this week. The website, called “ABBA Voyage,” asks fans to register interest in a new project, which goes live Sept. 2. Speculation is that they will announce their first new studio album since 1981. Some think they may also announce a world tour. The group’s greatest hits compilation, “ABBA Gold,” has sold 30 million albums.