Question: are abba in mamma mia?
Answer: (promoted as Benny Andersson & Björn Ulvaeus' Mamma Mia!) is a jukebox musical written by British playwright Catherine Johnson, based on the songs of ABBA composed by Benny Andersson and Björn Ulvaeus, former members of the band. The title of the musical is taken from the group's 1975 chart-topper "Mamma Mia".