Google seems to be pushing their All Access Subscription service for Google Music. I have been using this now for a few months, and have to say that I have not really found too many songs that were not available on the service. For the most part I am able to listen to anything I want. The best part about this service is that I am able to listen to entire albums, and for $9.99 a month you can't beat that. Most albums from my childhood cost anywhere between $10-$20!
Google wants you to try this service out, and they have sweetened their free trial deal by doubling it! For a limited time you can try it out for 60 days for free. There are over 30million songs included, oh and NO ADVERTISING!
via Play Music