Facebook co-founder Eduardo Saverin started his holiday celebrations early, taking over the VIP area of Pangaea in Marina Bay Sands in his hometown of Singapore with a bevy of beauties and friends and racking up an eye-watering $50,000 bar tab. Saverin, estimated to be worth $2.75 billion, ordered a 6-liter bottle of Belvedere and 20 magnums of Cristal Champagne, according to spies. After settling his tab with his black AmEx, the 29-year-old Brazilian-born entrepreneur — played by Andrew Garfield in “The Social Network” — was overheard telling the new mega-club’s owner, Michael Ault, that he was flying to Miami to spend the holidays with his family.