Related Clues:
- '70s rock superstars
- Bjorn's group
- Self-titled 1975 pop album
- 'Fer-nando' group
- ''Voulez-Vous'' singers
- 'Waterloo' singers
- 1970s hitmakers
- Quatrain rhyme scheme
- Biblical ''father''
- 'Mamma Mia!' inspiration
- 'Mamma Mia' foursome
- '70s pop quartet
- Acronymic pop group name
- ''Mamma Mia'' group
- "Fernando" pop group