Exclusive look: Inside Olivia Culpo's fitting for tonight's Go Red for Women Red Dress Collection

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Olivia Culpo will join over 20 celebrities tonight to walk the runway in support women's heart health, and it'll be a glamorous evening to be sure. The American Heart Association's Go Red For Women Red Dress Collection presented by Macy's will feature these famous women wearing custom-designed gowns by leading womenswear designers. Forever in an effort to bring awareness to the number 1 killer of women, heart disease, we're thrilled to see so many powerful women join with Go Red For Women to help educate us all on heart health.

Plus -- they'll be wearing really incredible gowns, created just for them. A little fashion and a little awareness -- what could make for a better evening?

We got an exclusive sneak peek into Olivia's fitting day leading up to tonight's big event. She will be wearing Marchesa, so we know her look is going to be beyond beautiful! Olivia walks us through each moment of her fitting day, below. Click through to see!

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Olivia Culpo Go Red for Women Red Dress Collection 2016
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Exclusive look: Inside Olivia Culpo's fitting for tonight's Go Red for Women Red Dress Collection
"How cool is this choker?? On my way to fit my Marchesa dress for the Go Red For Women #RedDressCollection - can't wait to see what it looks like!" 

"Chatting about heart health, my red dress and the upcoming fashion show. So excited to Go Red!"

"Here is my dress... what do you think??? I love it! Thanks Marchesa!"
"All done with the fitting. Now time for some fun....shopping!"
"How cute are these Margiela sneakers??? I love! #sneakertrend"
"My two favorite things ... family and ice cream. Do I have anything on my face? My sister says i'm all good. #mintchocolatechip #sprinkles #iloveicecream"
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Go Red For Women is the American Heart Association's national movement to end heart disease and stroke in women, and for more than a decade has fought for women's equal health opportunity. Click through below for full coverage of the runway show -- every single gorgeous red look!

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Red Dress Collection runway show
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Exclusive look: Inside Olivia Culpo's fitting for tonight's Go Red for Women Red Dress Collection

Miss Universe 2015 Pia Alonzo Wurtzbach walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Gigi Gorgeous wearing Laurel DeWitt walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Madison Beer wearing designer Halston walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Sofia Richie wearing designer Tabitha Webb walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Vanna White wearing Lee-Lim, from Fashion Incubator at Macy's walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Gail Simmons wearing Nicole Miller walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Candace Cameron Bure wearing designer Badgley Mishchka walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Serayah walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Ta'Rhonda Jones wearing Conrad Booker, of Fashion Incubator at Macy's walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Mary Alice Stephenson walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Maisy Stella and Lennon Stella wearing BCB Generation walk the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Marilu Henner wearing Escada walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Skylar Diggins wearing designer Michael Costello walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Kit Hoover wearing Designer Kanjana 'Cake' Carlos of Fashion Incubator at Macy's walks the runway at The American Heart Association's Go Red For Women Red Dress Collection 2016.

(Photo by Randy Brooke/WireImage)

Olivia Culpo attends the 2016 Go Red for Women Dress Collection.

(Photo by Taylor Hill/FilmMagic)

Monica attends the 2016 Go Red for Women Dress Collection.

(Photo by Taylor Hill/FilmMagic)

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