'The Simpsons' 20th anniversary party

The stars, animated and not, celebrated on a very yellow carpet

"The Simpsons" have a lot to celebrate. With 25 Emmy Awards and 20 seasons under their belt, there seems to be no stopping this animated family. The creators, actors and even the characters themselves got together in Santa Monica to celebrate this year's special "Treehouse of Horror" episode and their 20th anniversary.