The Simpsons celebrates its 800th episode with guest stars from The Pitt and a special performance of the iconic theme song by Boyz II Men.

Let them cook.

Lots of guest stars are joining the bonkers milestone ep.

Plus, Boyz II Men will also sing a new version of 'The Simpsons' iconic opening theme tune.

Actor and voice impressionist Hank Azaria explains to USA TODAY why he isn't sure if he'll stay with "The Simpsons" after his contact is over.

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