There's just two in a duo. A duo is a group of two, or a pair.
No, but Jay DeMarcus of Rascal Flatts was one half of the Christian duo East to West before joining the country trio.
A pair or a duo
A duo, a pair...
Grammy Award for Best Rock Performance by a Duo or Group with Vocal ended in 2011.
Grammy Award for Best Rock Performance by a Duo or Group with Vocal was created in 1980.
Technically, no duo won that year. The winner for Best Pop Duo/Group Performance was "Get Lucky" by Daft Punk, Pharrell Williams & Nile Rodgers. The winner for Best Country Duo/Group Performance was "From This Valley" by The Civil Wars.
"Stay," by Sugarland, won Best Country Performance by a Duo or Group with Vocal at the 51st Grammy Awards.
A couple, or a twosome. Also a duo, like Batman and Robin were the dynamic duo.
Just Us, We Two, Us Two, Dynamic Duo (oops, that's taken), The Peerless Pair, and The Hangers On might have a certain appeal...
A chamber group comprised of a soloist with piano.
couple or pair ...in music a duo