The Jackson 5

The Jackson 5 (also spelled The Jackson Five or The Jackson 5ive, abbreviated as J5, and later known simply as The Jacksons) was an American popular music quintet from Gary, Indiana. The group, active from 1962 to 1990, regularly played from a repertoire of R&B, soul, funk, and later disco. Considered "one of the biggest phenomenons in pop music" during the early 1970s, the Jackson 5 are also notable for launching the career of their lead singer, Michael Jackson.
http://en.wikipedia.org/wiki/The_Jackson_5