One of Broadway's—and later, Hollywood’s—favorite stories continues with Mamma Mia! Here We Go Again, which flashes back to the early years of Donna and the Dynamos. Like the first film, which wove its plotline from ABBA’s biggest hit songs, this soundtrack is a feast of the Swedes' joyful pop with even more dramatic reinterpretations of disco-era classics like “Dancing Queen,” “Waterloo,” and the moody "Fernando” sung by none other than Cher.