Here it is the address for fanmail and autograph requests for American Idol
This is no longer the one you should use since they are on tour. I'll post the new one soon American Idol
7800 Beverly Blvd.
Suite 251
Los Angeles, CA 90036
USA
How to send your fan mail and autograph requests to this TV show and its cast?:
If you want to request an autograph, follow the guidelines bellow. If you just want to mail a letter with the address above, and do not want anything back, then you can stop reading! If you live in USA send a properly stamped and self addressed
envelope (minimum size 8.5" x 4") with your request letter and a photo. You can include a piece of cardboard to keep the photo from bending in shipping and also add "Do Not Bend" on the envelopes. Send your letter and wait. On average, there is going to be a 3+ month wait for a response. If you do not live in USA, add several* International Reply Coupons. The International Reply Coupons (IRC) will be used by the receiver to purchase american
stamps. You can only get them at your post office. Place the IRCs into the envelope, not on it. For more information on reply coupons click here. *For information on
postage prices to receive a letter from USA ...
Here's a link to the site that says it all
http://www.fanmail.biz/1956.html