* Kōlea: This term refers to a group of singers, similar to a choir.
* Kākau leo: This phrase literally means "voice writing" and could be used for a group of people singing a song together.
* Hū leo: This phrase literally means "sing voice" and could also be used for a group of people singing.
The best option would depend on the specific context of your usage. For example, if you are referring to a group of singers in a musical production, "kōlea" might be the best choice.