Aside from being a pop star, Dua Lipa has clearly mastered the art of vacationing — and we caught her doing exactly that in Mexico on Saturday … hitting the beach in a teeny bikini and turning up the heat with some serious PDA with her fiancé, Callum Turner.

Check out the pics … the “Physical” hitmaker showed off her toned physique in a cheetah print thong bikini … allowing nearly every inch of her skin access to some sun action. At one point, she shimmied her way out of her bikini top to allow Callum to give her a full-body sunscreen rubdown.

The pair could barely keep their hands off each other, and at one point … had their arms wrapped around each other as they took a romantic stroll along the beach.

Dua fully earned her R&R, as she wrapped her “Radical Optimism” tour at the beginning of the month. She spent just over a year on the road bringing her music to fans around the world … but she made sure she got some days off, too.