Just like her Mean Girls [1] character Regina George, Rachel McAdams [2] could easily convince us to follow a number of fashion trends [3] — and last night's look definitely proved that. Attending a private dinner for Vanity Fair and Barneys New York, the star wore a statement-making blue dress by David Koma that simply took our breaths away. Not only were the cold shoulder and the statement sleeve two big styles we saw at NYFW [4], Rachel proved that off the runway, they're completely wearable.

Perhaps it was the fact that the piece was all one color, not overpowered by a loud design. Or maybe it's because she kept her accessories simple, skipping out on a necklace and wearing a few silver rings instead. Whatever the case, prepare to fall in love with the look from every angle. Then, see which stars are already wearing Fall '16 designs [5].

The design was an interesting twist on a simple blue dress.

While she posed with Mark Ruffalo [6], we got a better view of the figure-flattering number — and her neutral-colored shoes.

We'd like to imagine Sam Smith is complimenting this ruffled design. Rachel looks so good!