| Answer | Crossword Clue |
|---|---|
| ADELINE | Heroine of a popular quartet. |
| ACES | Popular quartet. |
| QUEENSTRANSFER | Popular harmony quartet? |
| ABBA | Popular Swedish quartet |
| HILOS | Popular '50s vocal quartet, with "the" |
| MANHATTANTRANSFER | Popular 1970's-80's vocal-harmony quartet |
