| Clue | Source | Date |
|---|---|---|
| Pop a cappella group with five members | ||
| Quintet that won a Grammy for their a cappella version of 'Dance of the Sugar Plum Fairy' | The Washington Post | 31 Mar 2018 |
| Quintet that won a Grammy for their a cappella version of "Dance of the Sugar Plum Fairy" | LA Times Daily | 31 Mar 2018 |
| Quintet that won a Grammy for their a cappella version of "Dance of the Sugar Plum Fairy" |