Why won't my twitter app open on my iPhone?

I updated the twitter for iPhone app after I downloaded iOS7 and it was taking forever to update then when it updated it wouldn't let me open the app. I deleted it then reinstalled it and the app still won't open but all the other apps I updated do open. The twitter app does not open at all. Any help? What can I do?

You have to restart your phone and it totally works.

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