While there are a few singers who can do this technique, Johnny Mathis was one of them. They are able to sing a note for a very long time by breathing in while singing out. This song is about 1.5 minutes and he holds the note easily that long. He could've gone longer until he got tired. Johnny One Note is the song. Showcase Playlist: https://www.youtube.com/playlist?list=PLEIkCS5zEjswGyIduJkmiutRFa63xhkIn @JohnMurphyabc
