Queen Wasabi, whose real name is Kim So-hee, lost 16 kilograms over 2 1/2 months before performing at the Waterbomb music festival in early July.
The rapper, who debuted in 2019, is known for her unique style and confident performances. Her weight loss regimen included diet, exercise and consistent use of Foodology's products.
"This personal experience with the brand led to her appointment as its new face," the company said.
To celebrate the partnership, Foodology has launched the Queen Wasabi Diet Set, featuring products that contributed to the rapper's transformation.
Fans can watch behind-the-scenes footage of her collaboration with Foodology on her YouTube channel.