The singer, who once suffered body image issues, agreed to peel off for the publication and go make-up less for the shoot.
And in one sensational shot, taken from behind, she shows off her stunning curves.
The Cool For the Summer singer explains she felt inspired to go bold for the shoot because her great-grandfather died the day before.
"If there's one thing I've learned in the past day, it's that life is too short," she says in the accompanying interview. "I'm about to launch an album that finally represents who I truly am. How do I embrace this new chapter in my life? How do I really walk the walk? What does it mean to be confident? It means letting go, being authentic, saying, 'I don't give a f**k and this is who I am. I want to show the side of me that's real, that's liberated, that's free'.
"(I said), 'What if we do a photo shoot where it's totally raw? Super-sexy, but no make-up, no fancy lighting, no retouching, and no clothing. Let's do it here, let's do it now."