Stephen Colbert celebrated St. Paddy's Day yesterday with quite the Celtic coup: an in-studio appearance by Samantha Power, the Ireland-born former Obama foreign policy adviser, Jezecrush and apparent victim of foot-in-mouth disease. (As you'll remember, Power famously - and not necessarily unfairly — called Hillary Clinton a "monster" last week.) Colbert gave Power a little bit of good-natured shit about the Clinton gaffe, then settled down and got "serious" when discussing Power's new book, Chasing The Flame, about the life and foreign policy genius of the late Brazilian diplomat Sergio Vieira De Mello. A video of Colbert's Hillary Clinton callout above, and more about Power's book, after the jump.

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