minstrel — a medieval poet and musician who sang or recited while accompanying himself on a stringed instrument, either as a member of a noble household or as an itinerant troubadour.
nightingale — Florence ("the Lady with the Lamp") 1820–1910, English nurse: reformer of hospital conditions and procedures; reorganizer of nurse's training programs.
troubadour — one of a class of medieval lyric poets who flourished principally in southern France from the 11th to 13th centuries, and wrote songs and poems of a complex metrical form in langue d'oc, chiefly on themes of courtly love. Compare trouvère.
warbler — any of several small, chiefly Old World songbirds of the subfamily Sylviidae. Compare blackcap (def 1), reed warbler.
chanteuse — a female singer, esp in a nightclub or cabaret
choralist — a person who sings in a chorus or ensemble
intoner — to utter with a particular tone or voice modulation.
singer — Isaac Bashevis [bah-shev-is] /bɑˈʃɛv ɪs/ (Show IPA), 1904–91, U.S. novelist and short-story writer (in Yiddish), born in Poland: Nobel prize 1978.
performer — to carry out; execute; do: to perform miracles.
voice — the sound or sounds uttered through the mouth of living creatures, especially of human beings in speaking, shouting, singing, etc.
accompanist — An accompanist is a musician, especially a pianist, who plays one part of a piece of music while someone else sings or plays the main tune.
artiste — An artiste is a professional entertainer, for example a singer or a dancer.