Let's say, for argument's sake, that you're not sick of Pharrell Williams's "Happy." You might even want to listen to it right now. Sure, it's a modern pop version of "If you're happy and you know it, clap your hands," but it's also a great way to annoy your coworkers.
Starting today, when you search Google for "Pharrell Williams", you'll be presented with hot links to a handful of music services so you can start listening right away. You can jump from your search results right to the artist page in Rdio, iHeartRadio, Spotify, Google Play, TuneIn, and YouTube.
Google says it working to expand this feature, especially to regionally-popular services like Deezer.
Note that this only works with artists, and only more popular ones at that. Searching for "Pharrell Happy" didn't give me deep links to music apps like "Pharell Williams" did. And searching for "Dethklok" yielded no deep links at all, just the usual search results.