After applying the update to IOS 7.0.4 from IOS 6 then iTunes store seemed to be sluggish and crashing constantly.
When searching songs and playing one, the screen goes black and returns to the home screen.
The quick and easy fix was to log in & out off itunes/app store.
To do so:
- Quit the iTunes app by doubletapping the home button and swiping the iTunes app upwards.
- Go to settings
- iTunes & App Store
- click your apple ID
- Choose “sign out”
- Sign in again
This should fix the problem.