What happens when mogul and a movie star get married? Contracts get signed, and the drama begins . . Ronald Perelman was born on New Year’s Day, 1943, and celebrates the occasion in extreme style. His annual New Year’s Eve–birthday party in St. Barts is one of the world’s most exclusive social events. The billionaire takeover artist hosts the gathering on Ultima III, his multi-million-dollar, 188-foot yacht, which he keeps docked in Gustavia harbor. In past years, Francis Ford Coppola, George Lucas, and Jerry Bruckheimer have attended the event, and for Perelman’s 60th, Barry Manilow sang “Happy Birthday.” This year,...