Only for Canadians. By becoming a fan of itunes Canada today and you will get 25 free songs (if they have not reached their quota yet). You have to click on the link that says get your free music, then verify you are Canadian (simply by clicking on the link I am Canadian). Then you get given a code (see below, this one was mine and will not work for you, but it shows what you are looking for)
You need to allow pop ups for facebook to open the itnues site, you also need to already have an itunes account and itunes on your computer. When you open itunes on your computer click redeem coupon to automatically download the playlist with 25 songs (from Metric to Kate Voegele). Now you are a fan you will also be notified of any new promos itunes Canada releases.