How could it not be withLordeandAddison Raejoining Sivan and Charli onstage at the Madison Square Garden?

At the center of this cultural movement is some very good fashion: Saint Laurent!

More than 100 pieces made by over 40 different designers.

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Charli in Rodarte, Sivan in Martine Rose.

And at the heart of it allalbeit behind the scenesare two talented, pop-culture-savvy stylists.

AsBrats fashion architect, Horan has given a look to the singular and elusive force behind Charlis hit record.

Its fabulous, aspirational, and simply cool.

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Sivan in Charles Jeffrey Loverboy and a Pandora charm belt, Charli in a Division custom jersey, Fleur du Mal bra, and Alice and Olivia jeans.

Vogue: Lets start with a vibe check.

The tour is all done.

How do you feel, what has this been like?

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Charli in Y/Project.

I am very well aware that this is probably not going to happen again.

This feeling of something being so culturally big and fun, it just feels amazing and Im already nostalgic.

I feel like Troye and Charli have both echoed that sentiment, too.

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Charli in Kiko Kostadinov.

Its really something special.

Its something you really want to enjoy and have fun with even as youre working on it.

Its pretty sad its ending.

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Charli in Kyriacos.

Horan: I will say, were also very tired.

It goes without saying its been a lot of work.

Right, youre still very much in it.

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Sivan in Craig Green.

Before Sweat started, Charli had done a few shows forBratand Troye had toured Europe.

How did you two approach Sweat differently to those solo moments?

Forne: From my side, Sweat was meant to be the common ground between both [artists].

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Sivan in Luar.

It was a challenge, but it wasntourchallenge at the beginning.

They had to make the show make sense.

Once that happened, the styling came in.

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Sivan in Collina Strada.

Thats how theBratshows were, and we thought it was sick to give each designer a moment.

I was also fearful because we wanted to keep the show exciting for people in each city.

That just doesnt work anymore.

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Sivan in Prada.

Charli in Kiko Kostadinov.

Sivan in Craig Green.

I feel like we now text like every day.

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Photo: Henry Redcliffe @hredcliffe

Forne: Yes, we do [laughs].

It was very organic to do this together.

We would change things, let each other know, etc.

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Photo: Henry Redcliffe @hredcliffe

Horan: And that never happened [laughs].

Marc was really kind because we fit Charli the night of the show both nights.

Chris…

Sivan in Collina Strada.

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Sivan in Acne Studios.

Id love for you both to give us a line defining the aesthetics for Sweat.

Forne: For Sweat I would say that its wearable rave fashion.

Horan: I was going to say wearable, too.

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Sivan in Prada.

These clothes are not stage proofed.

And I was like of course theyre not stage proofed, this is fashion!

Horan: [laughs] thats very real.

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Sivan in Di Petsa.

I now have to carve out what the red carpet looks like, and everything else outside of Sweat.

Right, theyre jumping around, dancing, kicking, etc.

Its a lot of movement.

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Charli in Av Vattev.

What were your initial reactions to hearing this tour was going to happen?

I dont remember the last time two pop stars toured like this.

Horan: Justin [Timberlake] and Christina [Aguilera]!

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Sivan in Av Vattev.

I mean, I was really excited.

I know both their songs back to front.

I knew it would be a giant party.

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Sivan in an Alled-Martinez look. The U=U (Undetectable = Untransmittable) symbol pays tribute to Queer pioneers who died of AIDS-related complications. It was created in collaboration with the Elton John AIDS Foundation and it is being auctioned in its benefit.

Forne: To me it felt like a big opportunity.

I knew it was going to explode so much more.

It even felt iconic from the outside.

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Charli in McQueen.

Sivan in Acne Studios.

Sivan in Di Petsa.

Charli in Av Vattev.

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Sivan in McQueen.

Sivan in Av Vattev.

Horan: Its really special for me because the way we did this album has kind of spoiled me.

I never feel that with this team.

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Lorde and Charli in matching Saint Laurent.

WithBrat, it was a lot of trial and error.

People always ask,what isBrat?

There are no real rules.

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Lorde and Charli in Saint Laurent. Lorde in Gianvito Rossi boots.

It all just happened because we were a family of creativity and it just started making sense.

Did I even answer your question?

[laughs]

Sivan in an Alled-Martinez look.

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Sivan in Dilara Findikoglu.

The U=U (Undetectable = Untransmittable) symbol pays tribute to Queer pioneers who died of AIDS-related complications.

It was created in collaboration with the Elton John AIDS Foundation and it is being auctioned in its benefit.

What I had to do was connect that universe with mine, which is the fashion side of it.

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Charli in Vivienne Westwood and Gianvito Rossi boots.

How did those funny moments come up?

Again, we were very much on the same path.

I have to also ask about the typo…I thought it was intentional.

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Sivan in 032c.

We didnt notice it.

The typo killed me, but its veryBrat.

Chris, I also need to talk about the Girl, so confusing moment with Lorde in New York.

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Sivan in custom Gap created in GapStudio.

Did you style Lorde for it too?

Horan: Yes, I did.

I wanted them to be twins, that was my thought.

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Sivan in The Attico.

Charli asked me one day if Id be down to style her, and of course I was.

Saint Laurent is one of my deepest obsessions, and I really wanted to make it happen.

And that was it.

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Charli in a Maison Margiela bodysuit and Christian Louboutin boots.

Lorde and Charli in matching Saint Laurent.

Lorde and Charli in Saint Laurent.

Lorde in Gianvito Rossi boots.

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Charli in Saint Laurent.

Marc, we need to talk about the One of Your Girls moment in the show.

Horan: My favorite!

Forne: Im quite happy with that one.

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Charli in Acne Studios.

We had Mugler, Jean Paul Gaultier, Dilara [Findikoglu].

Did you style the special guests for it?

So Ross Lynch or Vinnie Hacker?

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Sivan in JW Anderson.

Sivan in Dilara Findikoglu.

In so many ways…. Its basically what the song is about!

Do you have a favorite look by each other?

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Sivan in Thom Browne.

Its my favorite, so good.

Forne: Theres so many looks I love.

I was obsessed with the look that broke the most [laughs] the McQueen.

That look represents to me Sweat for Charli.

It has so much movement, it can be so trippy.

It gives a lot of emotion in the way she performs.

Im also obsessed with the Vivienne [Westwood].

It had been burning a hole in my pocket.

I cant believe we waited two months or however long to post it and for her to wear it.

Charli in Vivienne Westwood and Gianvito Rossi boots.

And a favorite look you styled?

Horan: I cant even say it, I feel like people will be mad [laughs].

Forne: I dont care [laughs].

My favorite was the diamond crotch piece that 032c made for us.

That was not my idea.

I think Troye and Charli also allowed us to play a lot.

I also think the Westwood is pretty epic.

And I do love the Saint Laurent one, thats a look shes worn multiple times.

Its hot and its a runway look, its not even custom.

Sivan in custom Gap created in GapStudio.

Sivan in The Attico.

I wanted to ask about the runway-to-stage pipeline.

The immediacy of that has gotten insane.

How does it work when you see something and want it immediately?

Horan: Im so annoying.

Im a Vogue Runway obsessive, I literally refresh the Latest Shows page constantly waiting for the new collections.

Neither of us, Charli and I joke about this, are unaware that this is a moment.

Its crazy, but thats the fun of it.

When you work with a person whose style is already clear and built, you see something and know.

Okay, one final question.

Its going to be Halloween soon, and Im sure we will see many Troyes and Charlis out there.

What is your advice to the kids out there who want to be them for Halloween?

Horan: My biggest thing is dont be lazy.

If youre going to do it, you really have to go for it.

I dont want just a white tank, unless its a wine-stained one [laughs].

Put some effort in, likeSNL[Saturday Night Live], they fully remade that Luar look.

Detail oriented, thats what Im looking for!

Forne: You need extremely long curly hair, sunglasses, legs out, high boots!

Horan: See, its easy bitch!

Charli in a Maison Margiela bodysuit and Christian Louboutin boots.

Charli in Saint Laurent.

Charli in Acne Studios.

Sivan in JW Anderson.

Sivan in Thom Browne.

Well let them figure that out themselves.

I feel like were genuinely close now, and Im sad he doesnt live in this country.

Forne: Same here!

We had a very good time.

I will also be coming back.

Marc loves a New York minute.

Forne: I really do.

Speaking of, Im going to catch a flight.