'Mamma Mia!' is a musical based on the songs of the Swedish pop group ABBA. Premiering in London in 1999, the musical features many of ABBA's most famous hits, including 'Dancing Queen,' 'Take a Chance on Me,' and 'Mamma Mia.' The story revolves around a young woman trying to figure out which of three men is her father, all while her mother deals with the return of old flames.

The musical was later adapted into a successful film in 2008, starring Meryl Streep, Pierce Brosnan, and Amanda Seyfried. The success of both the stage show and the movie solidified ABBA's lasting legacy in popular culture. 'Mamma Mia!' continues to be a popular production worldwide, with its infectious music and feel-good story.