The Everly Brothers, e.g (3)
I believe the answer is:
duo
(Other definitions for duo that I've seen before include "Music for two" , "Two players" , "Two of a kind" , "Performing pair" , "Pair (of people, things)" .)
I believe the answer is:
duo
(Other definitions for duo that I've seen before include "Music for two" , "Two players" , "Two of a kind" , "Performing pair" , "Pair (of people, things)" .)