This duet is one of my absolute highlight in my playlist just now!!
It might help that one of my favourite voices (of ALL time) (Malena Ernman!!!) is one of the performers.
These two voices are like water. Crystal clear, cold, crispy spring water. The way they slowly pour over you, and mixes with each other like two perfect streams, is just stunning. And the feeling (those goose bumps!!) of experiencing this tune actually reminds me of having pleasantly cool water poured over my head :)
// Tee -- Dries off a wee tear in the corner of the eye, before getting stuck back in on the Big Project.