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Jon Hamm was a guest on last night's "Jimmy Kimmel Live," which allowed Kimmel, whose wife hails from St. Louis, another opportunity to state his hatred of Imo's Pizza.

"Terrible," he called it several times during the segment.

Kimmel then confronted Hamm with an Imo's pizza and a more rustic pie that Kimmel had (allegedly) baked himself.

Which did our beloved hometown hero Hamm prefer?

Well, of course you have to watch the clip to find out.