Sanna, Shirley & Sonja are a Swedish supergroup that teamed up in 2008 for the chart-topping holiday album Our Christmas. Comprised of Sanna Nielsen (born on November 27, 1984, in Edenryd, Sweden), Shirley Clamp (born on February 17, 1973, in Borås, Sweden), and Sonja Aldén (born on December 20, 1977, in St Albans, England), the trio had not collaborated prior to Our Christmas. As solo artists, however, they were three of Sweden's most successful female pop artists in recent years. Clamp was the first of the three to reach mainstream pop success, hitting the Top Five in 2004 w...