His firm has worked with entertainers including Johnny Carson, Frank Sinatra, Joan Rivers and Robin Williams.

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Bloomberg is a member, as are comedian Joan Rivers and former New York Gov. Eliot Spitzer.

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Were there an awards ceremony for this sort of activity, these celebrities and activists would be strutting down the red carpet, and Joan Rivers would be critiquing their clothing choices.

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For Fox, O'Brien would be a far less risky choice than tried-and-failed hosts (Chevy Chase, Joan Rivers) of the network's past.

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Joan Rivers posted a tribute to Diller on Twitter.

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V. are filled with the names of celebrities who have hired him to testify in copyright, contract and libel cases in the past three decades: Kelsey Grammer, Joan Rivers, Blake Edwards, the Beatles, Larry Flynt.

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Previous winners of the show include comedienne Joan Rivers and former Britain's Got Talent judge Piers Morgan.

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Consider the lengthy list of personalities like Pat Sajak, Chevy Chase and Joan Rivers who have tried and failed in the host's chair.

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I'm pleased to report that Joan Rivers remains as funny as ever, perhaps even more so offstage than on.

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