App Store and iTunes is down
There's been a fair amount of complaining on social media, about Apple's various outlets being down. One problem sees users being told that they've been frozen out of their iTunes account, being asked to validate their details, only to find they still can't get in.
Other services are on the blink too, with problems arising with the App Store, iTunes Store, Mac App Store, Apple TV, iBooks Store, iTunes in the Cloud, iTunes Match and the Volume Purchase Program. Looks like there's issues with some iCloud services too.
People have also been reporting problems with iMessage too.
So, basically, if you've been trying to buy stuff through Apple, or update your apps, and been having a nightmare with it all, don't worry yourself unduly - it isn't just you. Of course, it is really irritating, but at least there's a load of you that have fallen foul of it, rather than something being wrong with your account.
If you look on DownDetector, you can see that this is a global problem across multiple Apple services. There's no word on what's happening yet, but it is safe to assume that Apple are trying to get it all fixed as quickly as possible.