Hi Vibeke
Welcome to the forum!
Now, here's what you need to do:
1. On the envelope addressed to the celebrity you wish to send to, stick enough Norwegian stamps on the envelope so you can post it off.
2. In the envelope put your letter, photos (optional), your SAE and enough IRC's to cover postage from the US to Norway.
Do not stick any Norwegian stamps onto your SAE, as the US Postal System does not accept foreign stamps. However, if you can get US stamps, you can stick the stamps on the SAE and not send IRC's.
Hope this helps. Good luck!
nowandagain [rockon]