Wild For Sabrina

The world can't seem to get enough of her joke-cracking pop. She's just warming up

- By ANGIE MARTOCCIO Photographs by DAVID LACHAPELLE

Put your arms in and get your chest below the water... just breathe in and out, super slowly.... You're doing great. Like, damn ... we've got 20 seconds left. Want to keep going?

I'm in the private suite of a swanky spa in Central London one morning in early March, and one of the world's biggest pop stars is guiding me through a cold plunge. Across from me, Sabrina Carpenter is shoulders-deep in a cylindrical wooden ice bath of her own, braving four degrees Celsius in a baby-blue lace bikini. When our three minutes are up, the 26-year-old rises out of the frigid water. "We're done!" she excitedly announces. "Wow. Already you're like, 'I'm a new woman.'"

As she famously sang in her inescapable hit "Espresso," Carpenter works late, 'cause she's a singer but she's also an early riser. It's 9 a.m., the morning after the first of two sold-out shows at the O2 Arena. Several celebrities were in attendance last night, including Harry Styles, Hugh Grant, Janet Jackson ("goated," Carpenter notes), Spice Girls' Emma Bunton (this show's honorary guest for "Juno," during which Carpenter "arrests" someone in fuzzy pink handcuffs), and James Corden, who brought his children backstage to meet Carpenter.

Though it wasn't Carpenter's first time playing the O2 - she opened for British boy band the Vamps there in 2017 and kicked off the Brit Awards just days ago with a sizzling performance that featured the Royal Guard - last night felt like her first official time. Or, as Carpenter simply thought to herself: "I run this bitch tonight."