Mamma Mia! is a musical based on the songs of ABBA, written by British playwright Catherine Johnson. The title of the musical is derived from the group's 1975 chart-topper 'MAMMA Mia'. The story-telling style of the musical is based on the narrative device of a bride trying to discover the identity of her father. The musical has been performed in over 50 countries and has been translated into 22 languages.