Free Online Music

Here are 3 ways to listen to music online. The first two are super easy, you'll have songs playing within 5 seconds.
Pandora Radio
This site has you type in a song or band that you like and it plays music that is similar. It's a great way to discover new bands that play the same type of music you already like. The downside is that you cannot pick particular songs and it only lets you skip a few songs at a time. It's sort of like a radio station tailored to you.

Grooveshark
This is similar to Pandora except it's better. It lets you pick the exact song you want to listen to, see every song from any band and make playlists to listen to. I first learned about it when i saw that Grooveshark had several lawsuits against it and the Android App store refused to support it. I knew it must be good if that many companies hate it.

Google Music Beta
This is brand new. It came out last Tuesday. It's only in Beta version and you need an invite to even use it. Apparently you will be able to load all your music online then be able to listen to it anytime from any device.