1,000 points to whoever can answer this question!

As • Mon, Jan 27

This is silly and absolutely not to do with anything... but I have had a song stuck in my head for 3 weeks and I can’t figure what it is! It’s driving me insane! It’s the intro to a show/movie. I believe it’s saying something like, “who are they, where are they, how could they possibly know”. Those may not be the exact words but similar. I believe it’s a woman singing it. Any ideas?