Abba’s Anni-Frid Lyngstad has said she was “surprised” when her bandmates Benny Andersson and Björn Ulvaeus said in a recent interview that the band’s new album ‘Voyage’ would be their last.Last week, of course, Abba released their first new album for almost 40 years, and next year they will launch a new live show in which the four members of the band will be represented by digital avatars.So, while it seems unlikely that the real Abba will perform together on stage again any time soon, what are