Steve 'n' Seagulls - Thunderstruck
https://www.youtube.com/watch?v=ikXXF7RqG_s
Turned a great song into a much greater song. Any group who can play hard rock/heavy metal at full speed on banjo, upright bass, mandolin, acoustic guitar, and freakin' accordion without being humorous are just awesome musicians.
Seen these guys in concert and they were AWESOME. I screamed like a little bitch, which I've never done, ever.
And as a bonus, 2cellos doing the same song as an instrumental on, well, two cellos. Nothing else. And it freakin' rocks.