Well if it's autotunes than many great artist we know are not using, but autotunes are just voice enhancer writing song, deciding the tones, getting the good director and know how to market it are the process which plays significant role to make it a hit and if you think about it, we also photoshop our photos before resume or any other purposes. Isn't this trick too ?? I think many singer openly agree they use autotunes, so it upto us to we listen or not.