<p>All the singles, all the albums, all the tours, all the TV specials and movies... all the ABBA! For four decades ABBA - the combined talents of Agnetha Fältskog, Björn Ulvaeus, Benny Andersson and Anni-Frid Lyngstad - has been a global music phenomenon, clocking up record sales of over 360 million. Unquestionably one of the most respected and recognisable brands in pop, Scandinavia's all-conquering musical export actually remained together for...