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Barry Diller threw a bash for wife Diane von Furstenberg’s 73rd birthday on New Year’s Eve aboard their $200 million yacht, Eos, in St. Barts, we’re told.

Guests included Leonardo DiCaprio and girlfriend Camila Morrone, photographer Jean Pigozzi, billionaire Nicolas Berggruen, “Inglourious Basterds” producer Lawrence Bender and Eugenia Kuzmina.

Chelsea FC owner Roman Abramovich held his annual bash, this time taking place aboard his $500 million yacht, Eclipse. The party has attracted A-list names like Prince and Paul McCartney in the past.

We hear the best late-night bash was thrown on another yacht by former chief design officer for Apple, Jony Ive, which, we’re told, drew a number of models.

The talk of the town though, says our source, is billionaire financier Nat Rothschild’s $100 million superyacht, Planet Nine, mooring up. We’re told the boat has been creating a buzz due to its different look since it is built to cut through ice — making its appearance a rare sight on the sunny isle.