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Arianna Huffington is filling in for Rachel Maddow on her MSNBC program this evening. Until then, the Huffington Post co-founder has been snooping around Rachel's corner office and getting prepared for the show. Arianna's video tour of Maddow's collection of pantsuits after the jump.

Behind-the-Scenes Video: Arianna Guest Hosts Rachel Maddow's Show [HuffPo]