My co-worker tends to leave the radio on mostly tuned to KSSK and I am not bothered by it even if he leaves it on when is out on a call but there are times when it's playing what I think is a commerical (or it might be a PSA but I doubt it) and at the end of the piece is a woman who is singing a high pitched tune like an opera for a couple of seconds. I don't know why she is doing this or the point of it. And I am not paying attention to the radio, until she actually she sings it.

Any one got a clue as to who is doing the commerical piece?