Spotify on Facebook. Reports are already surfacing that claim an integrated service is being tested now and will launch in just two weeks. Users can expect a Spotify icon on their Facebook homepage that will install the service on their desktops and allow them to listen to music with friends simultaneously. After the recent Facebook deal with Warner Brothers to stream movies, the social website may soon be a one-stop shop for all entertainment, social or otherwise. It may also provide some script fodder for The Social Network 2.