Barenaked Ladies did exactly that with their first single for their new album. It starts as the song, and then about 20 seconds in Ed and Steve (the bands co-lead singers) start talking about how this is actually an advertisement for the song. Back to the song for another
verse and
chorus... more Ed and Steve. It's done with typical BNL and humor, but the first time I heard it I remember why I used to like those guys. Of course within a day of the actual studio release of the song...