By Olivia Bahou
Updated Feb 11, 2016 @ 9:00 pm
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Nathaniel Wood

Former Miss USA Olivia Culpo certainly knows how to work a runway, so it’s no surprise that she is one of the many gorgeous women working the catwalk at the Go Red for Women New York Fashion Week show tonight. But she isn’t actually wearing a red dress—the star picked a stunning two-piece Marchesa number to strut her stuff in.

InStyle caught up with Culpo at the Andaz Hotel for her dress fitting, and the model dished on everything from tonight’s red carpet look to her secret for walking down the runway (hint: It’s a little kick!).

Click through to see her exclusive diary from the big night, and learn about her very personal reason for supporting heart disease research and awareness.

—With reporting by Brandi Fowler