Growing up, a viewer from New Jersey named Cari was always pretty fit. But after the 42-year-old mother gave birth to her three children, she says that changed.

"After I had my second son and then my daughter," Cari explains, "I was not losing any weight at all. I gained about 100 pounds."

RELATED: An Incredible Makeover Decades in the Making

"I hit rock bottom when I was trying to put on my favorite pair of stretch pants," she continues, "and even they wouldn’t fit."

So after multiple diets and exercises didn’t do the trick, Cari underwent gastric sleeve surgery -- per her doctor’s suggestion -- and lost 60 pounds.

"I feel better [and] more active," Cari says.

In fact, even her kids have trouble keeping up with her now!

RELATED: We Gave This Rocker a MAJOR Makeover — Weeks Before His Wedding!

But with the holidays right around the corner, Cari wanted to refresh her style to reflect her new shape. Not to mention that her husband’s family -- with whom she spends Christmas -- hasn’t seen her since she lost 60 pounds.

Wow!

With the help of our pal and style guru Gretta Monahan, Cari got a head-to-toe makeover -- and we revealed her new look to her husband Chris (and Cari herself!) right in our studio.

Watch the video above to see their reactions! (Spoiler: Chris got emotional.)

So, yeah, we can pretty much guarantee that her in-laws are going to be stunned on Christmas.

RELATED: This Man Makeover Reveal Will Take Your Breath Away