amous heads: Herman's Head, "Machinehead," hHead, Head tennis racquets, and the head on Guinness. The most famous head of all might be the gloriously umlauted metal heads, Motörhead. The London, England band have proved that you can find extreme longevity with a single formula. These guys have been around since 1975 despite never changing their template. But it's a template that works. Write some killer guitar riffs, play them as fast as possible, and howl out some lyrics in that way that only Lemmy can. Essentially the formula works as long as they can keep coming up with riffs. And, so far, they've been able to. In case you're wondering how this concert will go, just listen to the song "Ace of Spades" and you'll know. Expect mustaches, moshing, and mullets. Motörhead play tomorrow at the Metropolis.