A singing group is a collection of singers who come together to perform music. Common singing groups include chorales, octets, choirs, choruses, trios, GLEE clubs, altos, septets, and STOOLIES. A CHORALE is a group of singers who perform unaccompanied vocal music. An OCTET is a group of eight singers or instrumentalists. A CHOIR is a large group of singers who perform together in harmony. A CHORUS is a group of singers who perform together in unison. A TRIO is a group of three singers or instrumentalists. A GLEE club is a group of singers who perform light vocal music. Altos are the lowest female voices in a CHOIR. A septet is a group of seven singers or instrumentalists. A gleeclub is a group of singers who perform popular music. STOOLIES are a group of singers who perform a cappella music.