This is the first Facebook Music Store application and will let users of the social networking giant discover and download millions of tracks from major acts.
Users can rate and review tracks as well as make recommendations on their Facebook wall. They will be able to use the app without having to sign up for WaTunes first.
WaTunes CEO Kevin Rivers says, "We are very excited to be able to bring the WaTunes Marketplace in front of Facebook's 400 million users. For the first time, everyone can download music from Facebook without leaving the site. If a user wants to suggest an album to a friend, they are able to do it instantly."