Sean “Diddy” Combs warmed up for his Ciroc-sponsored New Year’s Eve bash at club LAX in Las Vegas with some big spending in St. Barts. Sources said the music mogul spent $500,000 to charter a 200-foot yacht for himself, his twin daughters, D’Lila Star and Jessie James, and their mother, Kim Porter, to troll about during his vacation on the island. Then he dropped $50,000 at club Casa Nikki, where he and Porter joined Tamara Mellon and a handful of others. Diddy also hosted late-night bashes on his yacht with guests, including Chili Peppers frontman Anthony Kiedis and Roman Abramovich. His rep had no comment.