What song would you choose if you were on a desert island & had an mp3 player with only 1 song?

I recently heard this song, About Her by Malcolm McLaren https://www.youtube.com/watch?v=KlHSqemPYuQ while watching a great film, Kill Bill Vol. II. I felt a lot of emotions listening to it and I am grateful for this. I think every person has song that is their song because it makes them think of things that are important to them & feel deep emotions.

Please in the comments write any songs you could not cope without if you were on a desert island!