Mamma Mia! is a musical with a book by British playwright Catherine Johnson, based on the songs of ABBA, composed by Benny Andersson and Björn Ulvaeus. It is an example of a jukebox musical, and is notable for popularizing the genre. Although the title of the musical is taken from the group's 1975 chart-topper "Mamma Mia", the musical's plot has nothing to do with the story of the group itself.