try musicsitethatisnotblocked.com
There are no such thing as websites that unblock blocked websites. Blocked websites are blocked through a firewall device such as SonicWall, and can only be unblocked from that device's options setting on the administrative computer connected to it.
aolmusic.com and cmt.com
If they are blocked - it is for a reason. Listen to music in your own time.
Nearly 30,000 sites are blocked in China. It's part of the censorship from the People's Republic of China. Major websites such as Youtube and Blogspot have been blocked recently.
PTA blocked sites are websites that are blocked by Pakistan. It is illegal to get around this, but it is rumored there are some proxy servers that allow this to happen. It is unclear whether this method will truly work or not.
It really varies per school, as the protection + sites blocked are different in every school (unless you use a shared one) I have added the related link to a music site that works in my school.
Camolist.com has a website full of proxies.
you can try sites like VEVO
If a whole category of sites are blocked it is usually with good reason, and attempting to evade the block will likely get you banned from the network. Familiarize yourself with your network's Terms of Service (or talk to your parents about their parental controls :P) and only contact ITS about asking for unblocking if the ToS does not seem to indicate usage of music sites is not permitted.
There are websites that will change your URL into something different so you can access sites the a content filter has blocked. Go to this website for a list of proxy sites: http://www.tech-faq.com/proxy.shtml If none of those sites are unblocked just search Google for Proxy sites and try ones till you find one that is unblocked.
None der are no legal and free music share sites
you can use 4shared .com you ca put any music you want download or you can just listen hoped it helped