That headline could look like a joke, but it's not. These chicks, Camille and Kennerly Kitt, are also known as The Harp Twins, and they've been performing their own versions of rock songs, and some non-rock songs too, publically for over a year now. Here they are doing Iron Maiden's "Fear of the Dark"

So two things I learned there: 1. You can rock on a harp. 2. You cannot look hardcore while playing a harp.

I guess they're also into cosplay...here they are doing the theme to The Walking Dead in costume...

Again, try as HARD as you can, you can't look very "rock" while playing a harp...sorry. Still a cool idea...