Teen Mom 2 star Kailyn Lowry has never looked better thanks to her weight loss transformation — and we can't believe it's been a year since she underwent a Brazilian butt lift!

The mother-of-two flaunted her hot body in this sexy new Instagram snap, where we mostly see her backside as she weighs herself. Kail donned black workout pants and a black cropped T-shirt for the photo-op.

"I don’t care what anyone says, I know what has been working for me!" she captioned the image.

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She sure does!

Kail paid a visit to famed-plastic surgeon Dr. Miami to undergo a "mommy makeover," and at the time he exclusively explained to In Touch what the procedures entailed.

"She had a tummy tuck and a Brazilian butt lift, which is a fat transfer," he said. "A fat transfer is where I take fat from areas of the body where you don’t want it — like your tummy, your back, your love handles — and I put it in your butt and so it does two things."

He then added, "You get liposuction and a nice, curvy, tiny waist — and you get a bigger booty! It’s a great operation."

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It's been a tough year for Kailyn, who split from her husband of four years, Javi Marroquin, back in May. They share a three-year-old son together named Lincoln, and the MTV star also has a seven-year-old son, Isaac, from her relationship with Jo Rivera.

MORE: Check Out Pregnant Chelsea Houska's Baby Bump

We've seen her marriage fall out on this season of Teen Mom 2, which has certainly been hard for viewers. Though their relationship has been rocky over the years, fans were hoping they would get past this rough patch — though Javi, a member of the United States Air Force, shut down any speculation of that nature on Twitter.

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"I don't know where the rumor started about me and Kail getting back together. No. Never," he tweeted earlier this month. "Not trying to disrespect but we are much happier apart."

The blonde beauty also hinted she moved on last week in a series of cryptic tweets.

Scroll through the gallery to see more photos of her weight loss transformation!