Last night, Cartier previewed its "New York City in the '70s" exhibition and held an after party attended by European princesses and America's royal couple, Jay-Z and Beyoncé. For an event thrown by the infamous jewelers, there wasn't much bling.

Jewelry designer Phoebe Stephens is no doubt wearing one of her own pieces, while Chanel Iman and Karlie Kloss wore simple, structured dresses that were light on accessories.

Princess Maria Elisabeth von Thurn und Taxis worked a more eclectic look while Princess Charlotte Casiraghi (Grace Kelly's granddaughter) was simple in a pantsuit. Lauren Remington Platt was a little dressier in sparkles.

Pantsuits seemed to be a go-to: Leigh Lezark, Natalie Obradovich, and Lily Collins.

Jay-Z and Beyoncé—the most casual of all the attendees—didn't do the red carpet and tried their best to avoid the party photogs.

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Scene staples—Michelle Harper, Sophia Lamar, and Lynn Yaeger—tend to be the most interesting.

Rita Ora, who performed at the after party, was one of the only attendees to really take advantage of the jewelry available to her, wearing a ring on almost every finger.

While Polina Proshkina and Rachel Taylor seemed business, Bade Iscil wore bedazzled rib cages on her shoulders.

Unfortunately, the asymmetrical hemline keeps getting recycled: Sofia Sanchez, Yoon Eun Hye, and Genevieve Jones.