DJ/Artists web site system

We need to construct on a .net server, a web sites framework system, like myspace, to allow several hundreds DJs and/or artists to present their music/videos/pictures/agenda. They also must be able to sell their music if they want to, with a Shopping cart with a Paypal paiement system. There will be a Fan registering system, and an admin system, so the DJs/artists can upload their medias, their news, their agenda, etc.. There will be a statistics system, so they can check how many pple have listened or bought their tracks. The system has to be multilanguage, and multi css templates, so we can personalize each mini site. A perfect example here: [login to view URL] or here [login to view URL] or here: [login to view URL]