Amie Street is a music portal with some particularities. The site enables downloads and uploads. If artists do upload music, this music starts as free downloads. But if a track gains popularity, it will become a premium download with a price up to 98 cents. So the price of a track is set by the users and musicians are assured to earn for good music. Some other features of the site are a recommendation system, messaging and the ability to connect with friends.
Similar services are available at music downloads and music sharing.