Themes:
Cowboys & Aliens:
http://marketplace.xbox.com/en-GB/Product/Cowboys-Aliens-Theme/e415e3a7-6748-4055-9390-9d7132e34698
The cleaner you are the dirtier you get:
http://marketplace.xbox.com/en-GB/Product/The-Cleaner-you-are-the-Dirtier-you-get-Theme/d5cbb84b-ad41-4dd1-ab8c-41afda2467ca