That girl really doesn't look like Miku Hatsune to me.
Her shade of hair is tinted too much toward the blue spectrum, her pigtails are too thin (And why are they curved like that?), and she looks a little too young.
Don't get me wrong, she's still mega kawaii, but I still don't think she's our Miku Hatsune.

Go find the artist and argue about it with him/her.

rather then the artist. argue with the person who added tags if you dont think they are correct. but personaly i would agree nix the voc and hatsune tags