The 2004 competition introduced a wildcard system where four artists are invited to take part in the competition by SVT. Lena Philipsson, who had previously lost the competition three times in the 1980s, was one of the first wildcards and won in 2004. As in 1995, SVT chose to celebrate the fiftieth anniversary of the competition in 2005, the same year Eurovision reached a half-century of competitions, for which two commemorative DVDs were released. A gala was held at Cirkus to determine the most popular Melodifestivalen song ever, a title which was won by ABBA's "Waterloo".