Pandora - It is called Pandora Radio. You can build your own radio station, any artist of your choice, and listen to nonstop music for as long as you like. You build your station with all the artists that you like. It is wonderful, the best music website I have ever found. You will love it. By minimizing the site, your music will play continually, while you are browsing other sites.
lala lets you listen to a full song for free once. For 10 cents, you can "download" the song for unlimited listening online.
Winamp
Mtv
youtube
real
shoutcast
last
blip
grooveshark
myspace artistname - many popular artists have 3 or 4 songs available to listen to in full.
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groove shark.you can also download music on your ipod or mp3 playerlog on or log in it is free or you can just listen to music .maybe you can add a friend or 2.
Any time depending on your mood, like at night if you want to fall asleep or in the morning or day time if you're feeling anxious or just happy. It's probably not the best to listen to it if it's...