By Kate Ward
Updated May 31, 2011 at 08:40 PM EDT

Attention, PopWatchers: You have only a little more than an hour to find out if Simpsons did it. Or, if South Park did. Or Futurama. Or, heck, even Scooby-Doo. Did what, you ask? Why, win our 25 Greatest Animated Series showdown — a contest determined by you, dear readers! At 6 p.m. ET, we will be closing our polls, so head here to vote for your favorite animated series of all-time. Then, head back to tonight for a gallery revealing which series can celebrate its win with a six-pack of Duff. Ready, set, go, go, go!

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