Can I change the email for Apple to send my iPhone 5 confirmation to?

I typed in my Mom's email on the billing info section when I put in my pre-order a few minutes ago, but now I would rather have it go to the email that is on my iPhone 4 or iPad since she uses our internet providers email and I use iCloud.

Yes you can. Go onto your account on Apple's website and find the page with your order. You can edit the e-mail address from there.