Because I love the production on this song, and great use of the phrase "Die Another Day", which really has no context with regards to the movie, but does through the song.
Contextually, 10 years ago it was really pioneering for a mainstream pop artist to have such a bleak and electro-infused song, and whilst it alienated a lot of casual listeners (and Bond fans), it was actually the best thing about the movie in my opinion, and the song was a major hit of course.
Personally, I adore this sound.
What's your favourite Bond theme and why?