Lizzo's Halloween costume is damn good.

The 'About Damn Time' singer dressed up as a box of Ozempic for the spooky holiday after denying taking the type 2 diabetes drug to lose weight.

On Saturday, Lizzo, née Melissa Viviane Jefferson, shared several posts on Instagram about her costume, which featured a white and red rectangular box with her stage name written on it in black letters.

“Do you need self-love? Try Lizzo! “Losing guilt, gaining confidence,” stood next to the pop star, who had tied a measuring tape around the waist of the costume.

“Side effects include: A smile on your face and a bounce in your step,” she added.

“Ok Halloween…you can start now 😜,” Lizzo, 36, captioned the post.

The four-time Grammy winner also posed next to a person wearing an inflatable suit of “South Park” character Eric Cartman to poke fun at the comedy that hit her in an episode titled “The End of Obesity” in May aimed.

“LizzOzempic dump 😎,” she captioned the video.

Fans praised Lizzo for using her Halloween costume to defend herself against weight loss allegations.

“The way you ate this up no pun intended,” one Instagram user commented.

“She got the joke and ran with it… She has a sense of humor 👏🏿😂❤️,” another added.

“This is how you clap back,” a third person said.

“This is how you turn the whole thing around!!!! I just love you,” a fourth fan wrote.

Last month, Lizzo criticized claims that she used Ozempic to achieve her recent weight loss.

“When you finally get Ozempic accusations after 5 months of strength training and a calorie deficit,” she wrote on Instagram on September 20.

The “Juice” singer joked that the allegations were “like a reward” after spending months in the gym.

Over the past few months, Lizzo has been documenting her weight loss progress, which she attributed to working out and eating healthier.

Earlier this month, the “former vegan” credited animal protein with helping her lose weight.

Stars who have admitted to using Ozempic to lose weight include Fat Joe, Kathy Bates, Macy Gray and Tori Spelling.