The Google Play Music app lets you listen to your music collection anywhere. All your music is stored online, so no need to worry about syncing or storage space.
* Music purchases from Google Play automatically appear in the app.
* Add up to 20,000(approximately equal to 100gb of online music storage,5mb per song) more songs from your personal music collection on your computer for free.
* Access your entire music library instantly with the Google Play Music app, and save your favorites for offline playback.
* Share a free full play of the songs you purchase from Google Play with your friends on Google+.
* Available in the U.S. only.***** (The player works outside U.S. but if you want the 20000 free online song storage then here is a tutorial how to get google music to work outside U.S.)