Ronald Belford `` Bon '' Scott ( 9 July 1946 - 19 February 1980 ) was a Scottish-born Australian rock musician , best known for being the lead singer and lyricist of Australian hard rock band AC\/DC from 1974 until his death in 1980 .
Bon Scott ( July 9 , 1946 - February 19 , 1980 ) was an Scottish-Australian singer-songwriter .