Yeah, she is Hatsune Miku, the cute and beautiful girl. Now, let's enjoy the beautiful Vocaloid Miku cosplay that is showed by a charming girl.
Why not? Since crossplay would bring us different enjoyment>.< Anything would be ok as long as we could have fun! And some of the boys even could do better than girls :D
If you are just a big fan of Vocaloid Miku(probably you are), any of you could give it a try, the noticeable hair and costume would make you popular and recognizable.