Q is a tough one. Not a lot to choose from. I could only find two that I knew. Que Sera, Sera, Doris Day, which reminds me of The Man Who Knew Too Much an Alfred Hitchcock movie with Doris Day and Jimmy Stewart (because she sings it in the movie), which then reminds me of The Man who Knew Too Little with Bill Murray which is a really funny movie .. but I'm rambling.
The other is Quiet Times by Dido. Not my favorite of hers, but one of my favorites from the Safe Trip Home album.