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Personalities : the way they act , how the are
Looks:the way they dress ,do their hair ,or makeup
Voice :their vocal cords in their mouth
Well duh they judge on voice. But normally the winner or runner up, has the looks or a great back up personality. For example the judges totally dissed on Allison’s outfit and didn’t say much about her voice. I mean ya its cool or stupid that she had a different look on but isn’t this show about the singing??