URGE is a digital music service from MTV Networks that makes it easy to enjoy, explore and get the music you want for your PC or portable music player. URGE gives you complete access to over 2 million songs, 18 music genres, countless styles and exclusives from MTV, VH1 and CMT. 

URGE is not available for Mac OSX but only for Windows and requires the latest service pack and Media Player. On the web site there are a couple of MP3 players that are compatible with the service.