This goth-y, glam-rocking London trio — who have won big audiences in the U.K. and South America — know from heaviness: Their sixth album includes lyrics about suicide and big-ass choruses that could go on an emo record. Placebo work up a widescreen electronic sheen on their new disc; the sleazy, sex-crazed disco burner "For What It's Worth" suggests they have a sparer, spikier pop alb...