Breaking down three of the most revealing moments from Shawn Mendes: In Wonder.

She just went over to say “Hi,” Cabello tells the camera.Then came the pleasantries.

Then came the song they wanted to write.

Shawn Mendes

Credit: NETFLIX 2020

Then came the Jingle Ball tour they did together.

Then came the four or so years they couldn’t see each other.

“And that’s really when the f—ing saga got started,” she says.

Shawn Mendes

NETFLIX 2020

He had gotten laryngitis, a swelling of the vocal chords.

The car ride where Cabello realized “Treat You Better” was about her.

“Everything is about her,” Mendes adds.

A song of his came on, he says.

Cabello asks, this is about me, right?

“Yeah it’s about you.

Everything’s about you.

They’ve always been about you,” Mendes says.

Mendes adds: “I’m rhyming off the songs.Treat You Better, all these songs.

She’s like “Oh my god.”

She literally had no idea.”

“And you’re like, ‘It’s not supposed to be captured.’

It’s just supposed to be for us.”

Two years later, Mendes' first No.

1 came as a collab with Cabello (her second) for “Senorita.”

Mendes is asked about starting out his career “making Vines for the love of it.”

So this thing you start doing in your bedroom, making Vines for the love of it.

Is it hard to protect that pure thing that started it all?"

a male voice asks Mendes early in the documentary.

Mendes nods with a gentle yes.

Gertler ran into Mendes' video, one of the first search results to pop up.

“Reached out, and we Facetimed Shawn and his mom” Gertler says.

Mendes' fans are evolved.

Popstar fandomhas largely gone virtualin 2020.

“Maybe it’s ‘cause I just posted the Instagram of the sunset,” Mendes casually says.

“Doesn’t mean that i’m down there.”