If you're an Eminem fan who has yet to pick up his latest and greatest (depending on who you speak to) album and are a Windows 8 user then head over to the Xbox LIVE Markeplace to download the Marshall Mathers LP2 Deluxe album for free.
This applies for the Xbox Music application on Windows 8, Windows Phone, and the Xbox systems. Additionally, there are seven other Eminem albums available to stream and download for 99 cents each.
You can also stream from http://music.xbox.com/ from your favorite web browser on earlier Windows systems. While there are iOS and Android apps available for Xbox Music, they require an Xbox Music Pass which is free for 30 days before you have to purchase the service. Microsoft states that this is a limited time offer, so get downloading before it's too late!