The Armani 5th Avenue store in New York City, designed by Massimiliano & Doriana Fuksas Architects, opened last week.

The central feature of the 4-storey store is a sculptural steel staircase.

Last night was the opening of the new Armani megastore on New York’s Fifth Avenue.

Designed by Italian architects Massimiliano and Doriana Fuksas, the 4,000-square-metre with the sinuous and futuristic spiral staircase in cream-coloured cement, had already been called by the Mayor Bloomberg as “Guggenheim Two”.

”This is not just a great architectural masterpiece but is also a vote of confidence in the future of New York as a fashion capital,” Bloomberg added at the opening.

This new Armani store held an exclusive party to celebrate the opening of Armani’s latest piece of Manhattan real estate.

A host of celebrities were present at the event included Leonardo DiCaprio, Alicia Keys, John Mayer, Josh Hartnett, Milla Jovovich, Molly Sims, Ricky Martin, celebrity stylist Rachel Zoe, Victoria Beckham, and a pregnant Mira Sorvino.

Armani created a “capsule collection” that will be available only in the Fifth Avenue, and some lucky celebs already wore it last night.