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Khloe Kardashian, Chelsea Clinton, Ivanka Trump, Kate Middleton

JAKE HOLLY/Startraksphoto.com ; Genevieve de Manio via Getty Images; Courtesy Brian Marcus/Fred Marcus Photography via Getty Images; Chris Jackson/Getty Images

It's just hours away from the big wedding dress reveal, but that hasn't stopped us from speculating what bridal style Kate Middleton might choose.

All three of these American princesses of entertainment, politics and business tapped Vera Wang to style their dresses for the big day, but with very different results: Khloe Kardashian opted for a sexy mermaid-style wedding gown that delivered on drama; Chelsea Clinton chose a romantic strapless bridal dress with laser-cut swirling silk organza ball skirt, and Ivanka Trump offered a sophisticated nod to Grace Kelly with her elbow-length lace sleeves.

So which famous bridal style is most likely to inspire Kate? Vote below and then log on tonight at 1 a.m. PT for all our livestreaming coverage!