Like all of her music videos from the past year, Taylor Swift's just-debuted "Wildest Dreams" is chock-full of gorgeous fashion. One piece that particularly caught our eye? The strapless pink gown she wears to the premiere of her faux film, redolent of glamorous retro screen stars. The dress is from Christian Siriano, was custom-crafted just for Swift after her stylist saw an Instagram peek of it and will come down the runway at Siriano's spring '16 show this NYFW, all before being returned to Miss Swift.

Wait—what?

"I got an email asking if we'd even loan it because it's something new. I wasn't sure if it was really done—we'd finished it, but hadn't tried it on anyone yet. It had just been finished being sewn in our studio," Siriano told us in amazement. The spring '16 piece was overnighted the next day.

Keep in mind all of this, more or less, just happened. Siriano said the initial call came in about three weeks ago, meaning the video (released during Sunday's VMAs) had an epically quick transition from raw footage to finished mini-movie.

The quick timing also meant there would be absolutely no way for Siriano's team to make another dress for the runway, so, yup, the one that walks the runway during his Sept. 12 show will be the exact one Taylor wore. "We have to find a girl that fits it pretty much like Taylor fits it," Siriano said, revealing that the video's stylist altered the interior corsetry and lining of the dress so it fit the singer like a glove. The piece itself was returned in pristine condition too and basically runway-ready.

"That's what's great about Taylor and her team. You can't get more chic than them, everything comes back clean, perfect and looks like no one's worn it"

A photo posted by Christian Siriano (@csiriano) on Jul 8, 2015 at 1:04pm PDT

The Instagram snap that first caught Swift's team's attention.

The gown worn in the video (and the one that'll be in Siriano's upcoming show) will actually make its way back to the star too. "Taylor likes to keep her pieces, so we'll send the original to her after our market. Hopefully she'll have it by mid-October."

The relationship between designer and pop star started when he dressed her for her Wonderstruck fragrance campaign. That dress, a frothy dream of a thing from his spring '11 collection, is for sure not one of a kind. The starring spot led to all kinds of interest and orders, with Siriano saying his team could barely keep up with demands. Here's hoping magic strikes twice!