crooner

Crooner is an American epithet given primarily to male singers of jazz standards, mostly from the Great American Songbook, backed by either a full orchestra, a big band, or a piano. Originally it was an ironic term denoting a sentimental singing style made possible by the use of microphones. Some performers, such as Russ Columbo, did not accept the term: Frank Sinatra once said that he did not consider himself or Bing Crosby "crooners".

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