Who: Karlie Kloss

Where: The J. Mendel Spring '13 after-party at No. 8, including a performance by Frank Ocean.

When: September 12th

What: A white, sleeveless silk dress with a plunging neckline and embroidery detail, by J. Mendel.

Why: Clean, white ensembles were all over the New York Spring '13 runways—leave it to Kloss to get a head start on the look.

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