Girl groups

The term girl groups can be used in two different ways:

Any musical group consisting of entirely female members, especially common in pop music, who sing but do not play any musical instruments.
A genre of music from the early 1960s United States, when pop-soul groups made up entirely of women found a large audience, especially among teens; these girl groups were closely associated with a few record labels and producers, especially Phil Spector and his Wall of Sound technique.