Originally Posted by Anon La Ply
For the sake of objectivity, I'd say the vocalists generally do more than just attempt to do the takes. These kids sing just fine, not awesome like Freddie or Dusty or Joe Cocker etc, but they are competent. And spunky, of course.
Remember what the singer who had the most number one hits in the last(20th) century said about Elvis even though he represented an entirely different style at the time. Paraphrasing He sings just fine and has talent, cant sing a ballad yet but that will come with time and experience. Btw the singer with the most number one hits in the last century was Bing Crosby. It's a good fact to remember. And also remember Jazz is pop music as are all of it's offshoots(rock etc) and a few of it's predecessors(Minstrel tunes, Ragtime, and Marching music held sway just previously) .