The Swedish pop group ABBA is one of the most successful bands in the world, having sold more than 400 million records. Thanks to their victory at the 1974 Eurovision Song Contest with „Waterloo“ they could start a world career. Songs like „Mamma Mia“, „SOS“, „Dancing Queen“, etc. ABBA has produced evergreens, almost everybody can sing along. Since their break-up in 1981, all four members have gone their own way. The good old times seemed to have gone. Benny and Björn could make another success with creating the ABBA musical „Mamma Mia“ and the movies.