Premise: Ronald Belford `` Bon '' Scott ( 9 July 1946 -- 19 February 1980 ) was an 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 . He performed in several other bands including The Valentines and Fraternity before replacing Dave Evans as the lead singer of AC/DC in 1974 . The Valentines were an Australian pop band active from 1966 -- 1970 , chiefly noted for their lead singers , Bon Scott , who later went on to great success as lead vocalist with AC/DC ; and Vince Lovegrove , who subsequently became a successful music journalist and manager of Divinyls .
Hypothesis: The Valentines' lead singer was Bon Scott.
Label: ENTAILMENT