If you'd like to add some more free songs to your ever growing music collection, you can actually get 25 free tunes courtesy of iTunes Canada and their facebook group.
You should see the banner on their group page, they call this the "back to school sampler" promotion. It's actually a facebook app called "free on itunes" and you have to allow it access to your facebook profile.
The songs are preset, you don't get to choose them. There are bands like Great Lake Swimmers, Dragonette, Inward Eye, The Dudes and Thrice.
This kind of Canadian freebie is great in that it introduces you to lots of little bands that you may never have heard of otherwise, and gives you a chance to broaden your audio horizons!
After you get your free songs, you don't have to keep on being a fan of the facebook group if you don't want to, just unfan them (or whatever that process is called)!