THE SIMPSONS: Homer Simpson as an avid stamp collector on THE SIMPSONS on FOX. THE SIMPSONS Trademark and Copyright 2009 TTCFFC ALL RIGHTS RESERVED. Copyright 2009 FOX BROADCASTING CR: FOX

THE SIMPSONS: (L-R) Cast member Dan Castelanetta at The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, May 7. Copyright 2009 FOX BROADCASTING CR: Michael Yarish/FOX

THE SIMPSONS: Executive producer James L. Brooks and cast member Yeardley Smith at The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, May 7. Copyright 2009 FOX BROADCASTING CR: Michael Yarish/FOX

THE SIMPSONS: Cast members Nancy Cartwright (L) and Julie Kavner (R) sign stamps at The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, May 7. Copyright 2009 FOX BROADCASTING CR: Michael Yarish/FOX

THE SIMPSONS: Creator and executive producer Matt Groening signs The Simpsons stamps at The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, May 7. Copyright 2009 FOX BROADCASTING CR: Michael Yarish/FOX

THE SIMPSONS: Host and cast member Kelsey Grammer at The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, May 7. Copyright 2009 FOX BROADCASTING CR: Michael Yarish/FOX

THE SIMPSONS: (L-R) Creator and executive producer Matt Groening and cast members Nancy Cartwright, Dan Castelanetta, Julie Kavner and Yeardley Smith sign stamps at The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, …

THE SIMPSONS: (L-R) 20th Television Chairman Gary Newman, creator and executive producer Matt Groening and cast members Kelsey Grammer and Nancy Carwright at The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, May 7. …

THE SIMPSONS: (L-R) Host and cast member Kelsey Grammer, executive producer James L. Brooks, creator and executive producer Matt Groening and cast members Nancy Carwright, Yeardley Smith, Dan castelanetta and Julie Kavner at The Simpsons …

THE SIMPSONS: Creator and executive producer Matt Groening and cast member Nancy Cartwright at The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, May 7. Copyright 2009 FOX BROADCASTING CR: Michael Yarish/FOX

THE SIMPSONS: (L-R) Creator and executive producer Matt Groening, executive producer James L. Brooks, and USPS Vice President, Ground Shipping Jim Cochrane unveil The Simpsons stamps at The Simpsons Stamp Ceremony at Fox Studios in Los …

THE SIMPSONS: Fans of THE SIMPSONS at The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, May 7. Copyright 2009 FOX BROADCASTING CR: Michael Yarish/FOX

THE SIMPSONS: Fans of THE SIMPSONS at The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, May 7. Copyright 2009 FOX BROADCASTING CR: Michael Yarish/FOX

THE SIMPSONS: The USC Trojan Marching Band during The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, May 7. Copyright 2009 FOX BROADCASTING CR: Michael Yarish/FOX

THE SIMPSONS: New stamps featuring THE SIMPSONS that became available to fans at The Simpsons Stamp Ceremony at Fox Studios in Los Angeles, CA., Thursday, May 7. Copyright 2009 FOX BROADCASTING CR: Michael Yarish/FOX