Overview:Challenged by Muscle Man, Mordecai and Rigby want to create the most popular viral video of all time.
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First Air Date: Sep 06, 2010Last Air date: Jan 16, 2017Season: 8 SeasonEpisode: 257 EpisodeRuntime: 11:14 minutesQuality: HDIMDb: 2.365 / 10 by 1922 usersPopularity: 252.89Language: en
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