Who is the greatest singer? Give reasons why

Nick Jonas, he definitely has a beautiful voice and really has a lot of talent, is charismatic, funny, loves his fans and is really humble, not one of those singers who go through life making them kiss each others feet, that is really annoying as these people swear that the whole world revolves around them and not change nick jonas así.En has everything ever made ​​any fuss you have made me disappointed ojala qe do so because that is great.