The Black Keys re-teamed with Danger Mouse to cut the first single off their new record — and they've never sounded tighter or funkier. Drummer Patrick Carney pounds the skins like a drugged-up Keith Moon, and Dan Auerbach cranks out a spiky riff that's laced with Hendrix-style guitar effects. 'Tighten Up' is definitely psychedelic, but these guys still have a thing for the blues: Auerbach yelps, 'Sick for days . . . I'm aching now,' with the raw intensity of Robert Johnson at the crossroads.