The hitmaker has revealed her custom-made rose gold chrome outfit designed by Rey Ortiz was as heavy as it looked, weighing just over 8kg.
After she performed WAP alongside Megan Thee Stallion in the ensemble at the Grammy Awards on the weekend, she captioned a post on her Instagram "Eighteen pounds on my body ... I had to wear it tho it was amazing".
Meanwhile, the 28-year-old star recently claimed it cost $1 million (more than R14 million) to shoot the music video for WAP.
Having joined the high ranks of elaborate red carpet gowns in celebrity fashion much like Rihanna and Beyoncè, Cardi B deserves a weightlifting honour for dragging these gorgeous gowns to the red carpet and performance stage with such grace.
Watch who made it onto our list of some of the heaviest celebrity red carpet gowns:
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