Google Now can currently link directly to Music Apps

Google Now service is constantly evolving to make your Android experience a more personalized one by providing you easier access to the applications and services you use most. Now, you are able to click on links to music services for the bands that you search for on Google Now.

So let's say you're searching for Arctic Monkeys, Google Now will pop up links to the band's YouTube page, and provide links to Spotify and the Play Music app. It also supports iHeartRadio, Google Play, and TuneIn. For now, this feature is only available in the United States, other countries with Play music will get it soon.

via