CNN keeping Kathy Griffin on a short leash for New Year's Eve broadcast

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Kathy Griffin is never one to apologize for her antics, but she will be the first to admit her surprise at being asked to return as Anderson Cooper's co-host for CNN's New Year's Eve countdown. 

As she rang in 2010, the comedienne dropped more than just the ball in Times Square. Griffin let an F-bomb slip while discussing Falcon "Balloon Boy" Heene. 

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