Ok, well whenever I want to listen to music I go to Grooveshark -- Listen to Free Music Online -- Internet Radio -- Free MP3 Streaming
Just type in any song or artist and it will bring up a bunch of songs including the one you searched if you searched just for a song, if you just want to line some songs up to play without stopping, find them all and click play. Then, just click the play button on the first one at the bottom of the browser. It has like almost every song on there.