Ten years after Mamma Mia! The Movie grossed more than $600 million around the world, fans are invited to return to the magical Greek island of Kalokairi in an all-new original musical based on the songs of ABBA. New additions including Lilly James and Academy AwardŽ winner Cher, join the original cast. Original ABBA member Benny Andersson produced and arranged the upcoming soundtrack. Sing-a-long version contains a bonus disc with instrumental versions of all of the songs featured on the soundtrack.