Join in and sing-a-long!! The delirious sight of Meryl Streep leading a river of multigenerational women singing “Dancing Queen” is one of the high points of Mamma Mia!, the musical built around the songs of the hugely popular pop group ABBA.

Meryl Streep leads an all-star cast in the feature-film adaptation of the beloved musical. 18-year-old Sophie has a problem. It’s almost her wedding day and she doesn’t know who her father is. It could be any of her mother Donna’s (Meryl Streep) past suitors: Sam Carmichael (Pierce Brosnan), Bill Austin (Stellan Skarsgård), or Harry Bright (Colin Firth). The only way for her to find out is to invite all three to her wedding to see what happens.