I imagine everyone has some guilty pleasure music: music you know is not actually very good, but which you sometimes enjoy listening to more than good music.
Christmas ranks high in this area for me, and so I might as well go ahead and confess right off that I'm listening to Trans Siberian Orchestra while working today. Sure, there's the excuse that I haven't got around to loading the fairly heft Darwin collection of Christmas music onto my iPhone yet (not because I'm a stickler for not listening to Christmas music during Advent, but because I simply haven't got around to it.) But truth be told, I'd probably be listening to Trans Siberian Orchestra anyway. Sometimes one craves utter bombast over quality.
What are your musical guilty pleasures? The guiltier, the better.