My Instagram app keeps crashing?

I have an iPhone 4S with iOS 7 installed. I've had Instagram for a long time and have uploaded over 300 photos, and have never had a problem until now. When I try to upload a picture, it takes me through the cropping and editing screens, and then as soon as it gets to the "add a caption" part, it freezes for a second and then closes the app. This is super frustrating and I've even tried logging into my account on a friends phone to upload a photo, and it still crashes, even though my friend never has this problem on her account.

Me

Maybe delete it then redownload

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