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Instagram mom Sarah Stage became #InstaFamous in 2015 by posting a series of photos exposing her six-pack baby bump while wearing lingerie. Although it's only been a year since her son's birth, Stage confessed to her 2 million Instagram followers: "Some days I miss being prego."

This Tuesday, the 31-year-old shared a throwback photo from when she was nine-months pregnant. Take a look, below.

She wore lingerie in the photo, of course.

Some days I miss being prego it was around this time last year when I was #36weekspregnant #9months with James

A post shared by 🍔SARAH STAGE 🍔 (@sarahstage) on

How did Stage maintain a rock-hard baby bump that's hardly a bump? "I made a promise to myself that I wanted to get into the best shape that I could before I was pregnant, and once I was pregnant I worked with my trainer, and he had little workouts you could do while you were pregnant," she told PEOPLE in January. 

Sources: PEOPLE