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

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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