The Black Keys release their eighth album this week, conclusively proving (yet again) that rolling just two deep is no barrier to making a mighty racket. 

On Turn Blue, the Ohio guitar-and-drums merchants compensate for their dearth of members with a powerful blues-rock assault, as well as the sort of intense interpersonal dynamic that only a tightly-honed two-piece firing on all cylinders can deliver. But do the Keys make our countdown of the coolest double acts in music history? Read on to find out.