UNDERRATED Louis C.K.: Ask almost any comic who's the best stand-up working today and this balding redhead with no internal filter will most likely top their list. A longtime collaborator with Chris Rock, C.K. earned an Emmy for last year's concert "Chewed Up," a dark and vulgar journey through marriage and family life that's as uncomfortably honest as it is hysterical. If you liked Carlin and Pryor, you'll love Louis C.K.
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