People throw around the phrase “making it look easy” pretty casually. But then Norwegian pop singer Sigrid, dressed in “running to the store” chic, comes out when the weather’s hotter than the devil’s pad Thai order and gives a straight-up master class at Austin City Limits Music Festival on Saturday.

Far be it from me to fixate on what the singer was wearing for no reason; her white T-shirt and Neil Young baseball hat struck such a strong contrast with her superheroic vocal chops. At times on the American Express stage, it felt like you were sitting on a couch in the recording studio and just watching her lay down a track with the greatest of ease.

Sigrid’s “Sucker Punch” album is top-to-bottom bops. She hit flawless falsetto on the title track to kick things off, and every standout song from the album — “Basic,” “Strangers,” “Mine Right Now,” OK probably all of them — hit sharp and catchy like Scandanavian pop should. “Mine Right Now” in particular felt like a right hook to your lizard brain.

» Related: Here’s what people are wearing at ACL Fest 2019

The set was one to remember, and a true festival highlight. Sigrid won’t be in 2 p.m. slots much longer.

“It’s warm. You must be used to this heat,” Sigrid said to the crowd about midway. “We’re from Norway.”

Later, she sat down on her piano stool and immediately jolted with a quick “Oooh! It’s so warm!”

Sorry about the weather, Sigrid. Take us back to Norway with you?

Listen to Austin360's interview with King Princess from ACL Fest Day One below: