In what dimension is Bieber a better singer or dancer than Timberlake? That has to be the strongest reach I've read on here. Bieber is constantly singing off key. Timberlake may not have much power to his voice but he knows how to use his voice, something Bieber still hasn't figured out. As far as dancing goes, that is obvious from their performances. Timberlake is way smoother and versatile. Justin only dances in one style and it looks clunky.