Li-sa-X is a 10-year-old Japanese girl who loves to play the guitar, and she doesn't go for the easy stuff, either. She likes to shred! Pick a crazy tech band, and she will probably want to cover their song, and do it better. (And with less emo hair).
Here she is, covering Polyphia's "Aviator", and she does an insanely good job with this song, and the band is probably jealous.