What you need to do is...
In/On The envelope that you are sending to the celeb:
-The celeb's name and address together on the front.
-Your return address in the upper left hand corner (This is so that you will get your stuff back in case of a bad address)
-Your postage in the upper right hand corner.
-Your letter, IRC's, SASE, and Pictures inside the envelope.
In/On the SASE that you are sending.
-Your address somewhere in the middle.
-If you are in the same country as the celeb, put postage on this SASE.
-If not no postage can be put on because your stamps won't be good there.
-Put some cardboard in the SASE and add "Do Not Bend" to the oputside of it. This will hopefully keep it form being bent.
Hope that this answered your Questions.
--Daniel

What you need to do is...
In/On The envelope that you are sending to the celeb:
-The celeb's name and address together on the front.
-Your return address in the upper left hand corner (This is so that you will get your stuff back in case of a bad address)
-Your postage in the upper right hand corner.
-Your letter, IRC's, SASE, and Pictures inside the envelope.
In/On the SASE that you are sending.
-Your address somewhere in the middle.
-If you are in the same country as the celeb, put postage on this SASE.
-If not no postage can be put on because your stamps won't be good there.
-Put some cardboard in the SASE and add "Do Not Bend" to the oputside of it. This will hopefully keep it form being bent.
Hope that this answered your Questions.
--Daniel :D