Who is the greatest singer? Give reasons why

I think to say who is better or worst singer is very subjective, but has always been saidthat Frank Sinatra was one of the best with M. Jackson. But the truth is that this timeI thought of an artist who has a unique voice, like his style, he is Vicentico. Vicentico is one of the most unique voices of Argentine and Latin rock, is an artist who has the ability to write songs with rhythm, danceable, to slow songs that touch the heart. Also, if we go back a few years ago, remember that it was founder and lead singer of "Los Fabulosos Cadillacs" a group that many people remember them for their greatsuccesses. Also, his talent has taken him to sing with Mercedes Sosa, to RickyMartin or FitoPaez, showing that other great artists also like help in the songs. Thetruth is that enough words to describe his talent so here the only thing remains is to wait for the June 23 and enjoy the best Argentine singers in rock history.