Mamma Mia! is a stage 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". Björn Ulvaeus and Benny Andersson, who composed the original music for ABBA, were involved in the development of the show from the beginning.
The musical includes such hits as "Super Trouper", "Lay All Your Love On Me", "Dancing Queen", "Knowing Me, Knowing You", "Take A Chance On Me", "Thank You for the Music", "Money, Money, Money", "The Winner Takes It All", "Voulez Vous" and "SOS". Over 42 million people have seen the show, which has grossed $2 billion dollars worldwide since its 1999 debut. A film adaptation starring Meryl Streep, Pierce Brosnan and Amanda Seyfried was released in July 2008.