Music service Spotify believes it can identify the type of car you will buy based on your musical tastes - and will start targetting advertising based its information.
The Spotify founder and CEO, Daniel Ek, told the Guardian newspaper: "There's a simple principle – we are trying to make a better advertising solution.
"For instance, combining demography with music taste, we can group you with other users. We can then predict whether you like Audi better than BMW and then serve you advertising from either of them.
"There are certain brands that want to be associated with things that are cheerful and others with classical music and there's a lot of things we can do in this area."