Xbox LIVE Went Down But it Was Fixed Within the Day

Xbox Live fixed, it's back up
As you may have noticed, Xbox LIVE was down today, but it is back up! That was quick. There are still some minor tweaks to be tweaked but Microsoft is really handling this whole thing pretty well.

Everything should be back up and running and ready to use! Thank you for your patience and enjoy the rest of your day.
Xbox LIVE Service 4/13/2013 6:21:02 PM PDT

The Last.fm App is still down since like Tuesday. Microsoft doesn't like to give explanations for problems so we don't know why. All we know is we just have to wait it out on that one.

Official Xbox Live Service Status
For the latest be sure to check the Official Xbox LIVE Service Status directly from Microsoft. They update it every 30 minutes.
Xbox Live Service Status