Remember when I got all excited when H&M announced they would be collaborating with Mason Martin Margiela for holiday 2012? Well, the discount clothier just released images of the entire collection, and I must say I am happy to see that the designer stuck to his avant garde aesthetic for this mass market collection. And what launch is complete without a fabulous party? On Tuesday, H&M converted nine floors of 5 Beekman Place into a fashion-meets-performance art extravaganza, with big-name celebs hitting the red carpet to support the cult designer. Sarah Jessica Parker, Julianne Moore, Alexander Wang, Kanye (sans Kim, but decked in a coat from the collection), and other A-listers were able to take in sculptural installations by contemporary artists including Daniel Arsham as well as shop the entire collection two weeks before it hits stores. And since no party is complete without a rainstorm of confetti falling down the open atrium connecting the floors of the building, they had one of those too. For those of us regular folk who have to wait until the collection hits stores to make a purchase, all we can do is stake out our favorites while we wait.