Jessica Simpson flaunts 100-pound weight loss in red bikini

Jessica Simpson appears to be showing estranged husband Eric Johnson what he’s missing.

The newly-single singer rocked a fiery red bikini for a mirror selfie shared via her Instagram Stories Friday.

Simpson, who lost nearly 100 pounds just a few years ago, styled her look with a green button down and white sunglasses as a navy “USA” hat sat on a nearby bathroom sink.

The 44-year-old added Tom Petty and the Heartbreakers’ song “An American Girl” as a soundtrack for the image, which was posted on the Fourth of July.

Simpson’s new photo comes several years after she opened up about struggling with her weight in her 2020 memoir, “Open Book.”

In the book, Simpson shared that her body image issues started at age 17 when music producer Tommy Mottola told her she needed to lose 15 pounds.

At the time, the 5-foot-3 songstress weighed 118 pounds and turned to diet pills to get to a staggeringly low 103 pounds. Her weight then fluctuated over the next 20 years.

A source exclusively told Page Six in January that the singer’s new body, which came as a result of changing her diet, has “unleashed a whole new side of her personality.”

“She suddenly [feels] 21 again,” the insider added.

Simpson is said to have ended her marriage to Johnson, 45, after her weight loss made her feel younger and more confident.

Simpson confirmed she and the former NFL player, who tied the knot in 2014, had ended things in January after 10 years of marriage.

“Eric and I have been living separately navigating a painful situation in our marriage,” Simpson told People in a statement at the time.

“Our children come first, and we are focusing on what is best for them,” she continued.

“We are grateful for all of the love and support that has been coming our way, and appreciate privacy right now as we work through this as a family.”

Simpson and Johnson share three children together: daughter Maxwell, 13, son Ace, 12, and daughter Birdie, 6.