Oops, they did it again. They cut the shirt too short and outed our jiggle, signaling an end to America’s prolonged cupcake binge.

In 1999, a 17-year-old Britney Spears exposed her taut tummy and inspired an influx of ab-centric trends. Extra-low-rise jeans. Belly bling. Henna tattoos curling around studded navels.

Over a decade later, abdomens are again on display, except by now, teen queens have aged into wiser 20-somethings, and pop stars — such as Katy Perry and Rihanna — are resurrecting a milder version of midriff exposure, no crunches required.

“This midriff is different than the one of a decade ago,” said Lourdes Font, a professor at the Fashion Institute of Technology in New York. “The previous trend was … so extreme that pants barely covered the lower body. Now, fashion is anchoring the waistline at the natural waist, and it’s shifting our eyes above the navel.”

But raising the waistline means a resurrection of the hourglass figure. Font hopes that this incarnation of belly madness will lead to a healthier shape for women and the industry.

“You can’t emphasize the natural waist of a woman without curves,” Font said. “I hope these new proportions lead to curvier hips, actual breasts, an ideal body that exists in nature.”