A free Winter Holiday Xbox 360 Premium Theme is now available on the Xbox Marketplace, to access it follow the directions below.
1.Browse to Game Marketplace and click "Explore Game Content".
2.Click "Themes And Gamer Pictures".
3.Then click "All Themes And Gamer Pictures".
4.Click "All" and then "Xbox 360 Community".
5.Go to the "Featured Downloads" tab and select "All Downloads"
6.Select "Winter Holiday Theme".
You can now start downloading the theme and then enable it by changing your theme to it in the "My Xbox" section of the dashboard.