Credit:
Add to those 17 countries -- among which are Australia, Canada, New Zealand, the United Kingdom, France, Germany and Spain -- an additional 20, mainly markets in South and Central America.
European users in Estonia, Latvia, Lithuania, and the Netherlands will also be able to switch the songs in their collection with higher quality copies from Apple's vast library (for an annual fee).
To see whether your country is listed make sure to check the source link for the service availability.
Source: Apple