By Unknown

Third-Party App: Nuvola Player

Nuvola Player is a third-party application that runs a web interface of cloud music services in its own window. Currently supported services are Google Music, Amazon Cloud Player, Grooveshark, Pandora, Hype Machine, Rdio, and 8tracks.
When you first open Nuvola Player, it displays all the available streaming options. Simply sign into a service, and you're listening to music in no time.
If you're looking for strong, consistent design aesthetics between each app, you've misundertood Nuvola. It simply frames the web-service in a standalone app. Here is Pandora in all its visual and audio ad glory.
One bright spot is the Rdio. Their interface is so minimal, making it fit in nicely on an elementary desktop.
To install, add the Nuola Player PPA by pasting the following into terminal. sudo add-apt-repository ppa:nuvola-player-builders/stable
sudo apt-get update
sudo apt-get install nuvolaplayer
Finally, friend of the site and all around great icon designer, TraumaD91, has made a stunning Nuvola icon for elementary users. To use, simply download the icon pack, and extract it to ~/.icons/elementary/apps.