Here are a few addresses to write, should you wish to gush over Justin's recent appearance or ask your favorite show when they are going to have him on.  A few suggestions about writing, based on trial and error over the past few years:

• Write as an individual. Most show producers are savvy these days and can recognize an organized fan campaign a mile away. However, they want to hear from viewers of the show who want to see certain celebrities appear and/or perform. Send one email or letter to the show. If you don't see anything after a couple of weeks or a month, write a follow-up. Don't bombard them--they hate that and have been known to take it out on the celebrity.
  
  
• Write as a fan of the show as well as of Justin. If you can, personalize the email to show you are a viewer. Mention a joke Conan made, or a story Oprah did, etc.
  
  
• Keep it short, not more than four or five lines, especially to talk shows that just have celebs on. Shows like Oprah that do themes might be interested in a longer message or story.
  
  
• Bottom line is to write if the muse strikes you. Just remember you'll catch more flies with sugar than with vinegar.

CBS News Sunday Morning

Email: sundays@cbsnews.com

Snail mail:

CBS News Sunday Morning
Box O (for Osgood)
524 West 57th St.
New York, NY 10019

Website: CBS News Sunday Morning

The Daily Show with Jon Stewart

Email: none known.

Snail mail:

The Daily Show
513 West 54th Street
New York, NY 10019

Website: Comedy Central's "Daily Show with Jon Stewart"

Ellen DeGeneres

Email: Go to the Fun Stuff page, click "What's On Your Mind," halfway down the page on the right.

Snail mail:

The Ellen DeGeneres Show
3000 West Alameda Ave.
Studio 11, Suite 2700
Burbank, CA 91523

Website: The Ellen Degeneres Show

The Early Show on CBS

Email: earlyshow@cbs.com

Snail mail:

The Early Show
c/o CBS News
555 West 57th Street
New York, NY 10019

Website: The Early Show

Good Morning America

Email: Scroll down to "Resources" on right side of website page. "E-Mail Your Comments & Questions to 'GMA'"

There is a message board for comments.

Snail mail:

Good Morning America
157 Columbus Ave., 6th Floor
New York, NY 10023
(Write your name, address, phone # on letter. On outside of envelope, write "story idea")

Website: Good Morning America

Jimmy Kimmel Live!

Email: Go to Send It In! on left side of page, select 'Send it via the Internet, then select 'suggestions' from the drop-down box.

Snail mail:

12:05 AM Productions, LLC
6834 Hollywood Blvd., 6th Floor
Hollywood, CA 90028

Website: Jimmy Kimmel Live!

Last Call with Carson Daly

Website: Last Call with Carson Daly

Live! With Regis & Kelly

Email:  None.  They want fans to send in faxes, which you can do from your computer.  Fax Number: (800) 330-1106

Snail mail:

Live! With Regis & Kelly
7 Lincoln Square
New York, NY 10023

Website: Live with Regis and Kelly

The Late Late Show with Craig Ferguson

Email: click 'e-mail show' in banner

Website: The Late Late Show

Late Night with Conan O'Brien

LateNight@nbc.com

Snail mail:

Late Night with Conan O'Brien
c/o NBC Studios
30 Rockefeller Plaza
New York, NY 10112

Website: Late Night with Conan O'Brien

The Late Show with David Letterman

Email: Go to the FAQ, second question, click 'feedback.'

Website: Late Show with David Letterman

The Oprah Winfrey Show

Email: Go to E-mail us and select "send us your show suggestions," about halfway down the page.

Snail mail:

The Oprah Winfrey Show
110 N. Carpenter Street
Chicago IL 60607

Website: Oprah.com

The Saturday Morning Early Show (Second Cup Cafe)

Email:  SAT@cbsnews.com
Note:  The website says they don't accept story ideas by email, but you should be able to praise a performance you see.

Snail Mail:

The Saturday Early Show
524 West 57th St., 7th Floor
New York, NY 10019

Website: The Second Cup Cafe

Saturday Night Live

Email: SaturdayNightLive@nbc.com

Website: NBC's Saturday Night Live

The Today Show (NBC)

E-mail: today@nbc.com. Use the Subject: “Toyota Concert Series” and suggest a performance by Justin Guarini.

Snail mail:

Polly Powell – Senior Broadcast Producer
Rm 347 E
30 Rockefeller Plaza
New York, NY 10112

Website: The Today Show on NBC

The Tonight Show with Jay Leno

E-mail: tonightshow@nbc.com. Use the subject: "Suggest a Guest" in your e-mail.

Snail mail:

Tonight Show with Jay Leno
3000 Alameda Avenue
Burbank, CA 91523

Website: The Tonight Show with Jay Leno

The Tyra Banks Show

Email: none known, but there is one at her personal website:  tyrabanks@studiofanmail.com

Snail mail:

Tyra Banks
c/o Studio Fan Mail
122 S. Robertson Blvd. #15
Los Angeles, CA 90035

Website: The Tyra Banks Show