Go for it, dude.
Get her to teach you to say a few lines.
(She'll probably teach you to say "Jeg Elsker Deg" - I Love you)
Tell her a Norwegian dude told you to say "Bli med meg hjem og se på frimerkesamlingen min."
And that it means "I would like you to come home with me."
(it means "come home with me and I'll show you my stamp-collection." )
or some cheesy pick-up line in Norwegian like:
"kan jeg få være med deg hjem og se på puppene dine?"
"Jeg husker ikke telefon-nummeret mitt, kunne jeg fått ditt?"

Go for it, dude.
Have fun, and get her to teach you something in norwegian (getting chicks to teach you stuff is killer. At least in my experience. They all want to teach you something either funny or curious, which you then can use the next time you meet someone from the same place)