The daughter of Bill Gates and his ex-wife, Melinda French Gates, is living in a grand $51 million Tribeca triplex penthouse with its own plunge pool.

We sourced data from millions of visitors seeking New York City luxury properties from around the world and found that Hong Kong ranked as the top international city seeking NYC luxury properties...

The waterfront estate is located in one of the most exclusive towns near New York City. It is just 35 short minutes away from Wall Street by the luxury high-speed ferry. The estate was originally built in 1998, and completely rebuilt during 2007 and 2008 using the best materials and craftsmanship. It is over 8,000 sq. feet of comfort and luxury that sprawls on approximately 1.4 acres of land. It is located directly on the safe harbor of the river that provides direct access to the Ocean.

Demand for luxury apartments in the Financial District, once considered just a place to work and not live, is picking up—and so are rent levels.

Extell Development is set to break ground on a $1.3 billion skyscraper, according to the New York Times. The 1,005-foot-tall building on 57th Street near Seventh Avenue will become the tallest residential building in the city, surpassing the 861-foot-tall Trump World Tower.

Mexico's Carlos Slim Helu, AKA the world's richest man, is in contract to buy 417 Fifth Avenue. for $140 million, or $343 a square foot. The 11- story tower is at the corner of East 38th Street He's purchasing the building from Joseph Moinian and Goldman Sachs, which purchased the building for $250 million during the height of the real estate boom. Carlos Slim is the first non-American in 16 years to top Forbes magazine's annual ranking of the world's billionaires.

Conservative talk radio blowhard Rush Limbaugh has put his Fifth Avenue penthouse on the market. Limbaugh promised that he'd sell his Manhattan apartment last March after the Paterson administration proposed raising taxes on New York residents who make more than $500,000 a year. The 20th-floor penthouse at 1049 Fifth Avenue, which Limbaugh purchased in 1994 was officially listed two weeks ago for $13.95 million.

Britney Spears' former penthouse at 14 East 4th Street has been price-chopped once again. The three-bedroom pad, which Spears unloaded in 2006, is now up for sale for $4.999 million, down from the $6.595 million its owners were seeking when they put the place on the market in 2008. When Spears sold the apartment in 2006, it was after two years of sitting without a buyer and after $2 million in price reductions.

The list of the most expensive cities in the United States is now out, and unsurprisingly, New York has taken the top spot, with a cost of living that's double its closest follower. All 10 cities measured jumped in Mercer's worldwide rankings. Out of 253 major metropolises around the world surveyed, New York this year ranked 8, up from 22; Los Angeles ranked 23, up 27 places from 2008. The top five most expensive U.S cities also saw their worldwide ranks surge: White Plains, a destination for expats, jumped from 89 to 31; San Francisco from 78 to 34; and Honolulu from 77 to 41.

Whoopi Goldberg has put her SoHo loft on the market. She has listed the 3,600-square-foot, two-bedroom space located at 101 Wooster Street for $3.99 million. The property has been on the market since June 30, Curbed reported, but Goldberg's ownership has just been revealed.