Firefly and 21 other TV theme songs in 7 minutes: Video

Yes, we know that not every TV theme song in this amazing video is sci-fi, fantasy or horror, but the entire performance is so perfect that we don't mind a little Cheers mixed in with X-Files, Firefly and True Blood.

And once you watch it, we think you'll agree.

Our only question is—are these twins, or one guy who knows his way around video editing software? We're leaning toward the second.

What do you think?

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