Season 21 of The Simpsons includes lots of gags and celebrities to celebrate the 20th anniversary. The season kicks off with an episode co-written by Seth Rogen. Browse this picture gallery of The Simpsons season 21.
Images 1-6 of 6
 "Homer the Whopper" |  "Treehouse of Horror XX" |  "Treehouse of Horror XX" |  "The Devil Wears Nada" |
 'The Simpsons' 20th Anniversary |  20th Anniversary |
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