If you're talking about on a device, just download them again.
If you're talking about actually removing them from your account - the only way to do that is to call CS, talk VERY nicely, and hope they will restore them for you (they don't have to - you were warned before they were actually deleted).
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There is no such thing as a stupid question!
Corollary -- so long as you read before you post and stay on topic. :)