What do you do when 1/7 of your castmembers can sing?

Well, if you're Joss Whedon you make a musical episode of Buffy the Vampire Slayer.

However, what most people didn't know up until that point, that was quickly discovered after, was that one castmember, James "Spike" Marsters, is a member of an LA based rock band ("Ghost of the Robot" or some such thing).

Well, here's the YouTube video...didya notice that he sings it with his full SoCal accent, leaving behind the British gag?

And here's the lyrics.

Update, 2:19am: My bad, that should read 2/8, since Anthony Stewart Head also sang in that episode, and he can sing as well (and in a real Brit accent no less).