Question: Who sang it's a long way to the top?
Disambiguated questions and answers: question: Which band sang it's a long way to the top?
Who was the lead vocal of it's a long way to the top?
answer: AC/DC
Bon Scott
Ronald Belford "Bon" Scott
Natural Questions answer: AC / DC (from the Wikipedia article "It's a Long Way to the Top (If You Wanna Rock 'n' Roll)")