Her two-piece set was a 1997 Paco Rabanne look.
The pop star is expecting her second child with A$AP Rocky.
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The superstar also reiterated why she chooses not to recognize birthdays.
Whether you're heading to music festivals like Coachella, Stagecoach and Lollapalooza or popular concerts like Taylor Swift's Eras Tour, you'll need a few accessories first.
"Protek that skin bruhhhh," commented One Republic's Ryan Tedder on the "Señorita" singer's photos from Mexico City.
"I can’t breathe," one fan tweeted after the pop star was filmed smooching the model.
"I've always advocated for kindness and really want this all to stop," the singer-actress said.
The song is off their new EP, RR.
The artist also revealed her new bra size on Twitter.