The Blues Brothers are an American blues and soul revivalist band founded in 1978 by comedians Dan Aykroyd and John Belushi as part of a musical sketch on Saturday Night Live. Belushi and Aykroyd, respectively in character as lead vocalist "Joliet" Jake Blues and harmonica player/vocalist Elwood Blues, fronted the band, which was composed of well-known and respected musicians.
Source: Wikipedia, "The Blues Brothers," available under the CC-BY-SA License.