Research In Motion announced on Wednesday that its BBM Music service will launch Wednesday in the United States, Canada and Australia. To begin, users can opt to sign up for a BBM Music Premium membership, which will allow them to access music and share with friends on their BBM contact lists. BBM Music Premium members will be able to select 50 initial songs from a library of millions. Members will then be able to view and play the 50 songs selected by other BBM Music Premium members in their contact list. A premium membership costs $4.99 per month after a free two-month trial. The free version of BBM Music only allows users to listen to 30-second previews of each song. RIM said the application will be available for download from the BlackBerry App World within the next before Thursday morning.