Future Publishing and WH Smiths are giving away 10 MP3 tracks via 7digital with selected magazines. The price of a download on 7digital is about 99p per track so 10 tracks are worth just shy of a tenner, although if you buy a complete album you will pay closer to £8.
The cheapest mag I could find doing the offer was T3 at £4 so on the face of it that seems to be a pretty good offer.
Get down to you local WH Smiths now and look for the magazines with a bit of card welded to the back page. Needs to be a high street store though and not a Smiths at your train station.