Model S owners outside of the US are in for a treat, with Tesla Motors announcing today that it has partnered up with Spotify to provide built-in Spotify Premium into the Model S.
Tesla is only offering Spotify Premium to Model S owners in Europe, Australia and Hong Kong - with the US to soon receive the streaming music offering, but just now for now. The integration won't require that Model S owners install the Spotify application on their phone, or to even have a Premium account of their own. Spotify Premium will be built into the car, and will only work with that specific vehicle.
On the other hand, if you've already got a personal Spotify Premium account, you can link that instead.