Music won't play after iOS 6 update?

So I updated my iPhone 4, to iOS 6 and when I double click the home button, while locked, it won't play my music at all? It won't pause it, change to the next song or even show the songs name!

Does anyone know how to fix this?!

Apps that were added by you and all music is removed from the device as a result of updating. Restoring from a backup won't remove ios 6. Alternatively, if all of your music was purchased from iTunes, log into the store and click on the purchased tab to download to the device (do the same in the apps store)

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