iTunes Radio - All Stations Stopped Working !

So I've been listening to iTunes Radio happily from the US account for the past 3-4 days. Love the ability to make my own station and customize songs.

Then suddenly today it just stopped working. I can't play any of the stations I have. The status bar on top tries to connect to about 5 songs and then fails. Also ALL the featured stations (eg. iTunes First Plays, Top 50 pop, Grammy's, Beatles Radio, Bob Dylan Radio) have all dissapeared. Instead of the featured radio album cover that you see on top, it shows a message "There are no additional featured stations at this time".

What should I do ?