Twitter announced this morning on Good Morning America that it now offers a music service app called #music. This app will use Twitter activity, including Tweets and engagement, to detect and surface the most popular tracks and emerging artists. This app has a unique layout and also offers suggestions of music you may like. The music comes from a combination of Spotify, iTunes and Rdio. #music will be available on desktops and even on the go with an iPhone. This new app shows how twitter is expanding its services and continues to satisfy its users.