Google Play Music gives you new widgets following an update in the Google Play Store
After you update the app, searching for a particular song or artist, will result in public playlists appearing at the bottom of the screen. You can subscribe to these playlists or download them just as if you had created them yourself. The update also includes improvements to the download management which is now called "Manage downloads" from its previous name, "View download queue." The name might be different, but it works the same way. It also will show you how much room on your device is being taken up by your tunes, and reveals the best ways to clear them from your phone.
The update is in the process of being pushed out now, and you should be able to find it at the Google Play Store.
source: GooglePlayMusic via AndroidCentral