Looking good, Deena Cortese!

The Jersey Shore alum showed off her impressive weight loss in this adorable new selfie.

Deena, who is engaged to Chris Bucker, made sure her midriff and engagement ring were on display for the photo op.

The bikini-clad reality star has been open about her grieving process after losing her father last June — and found a reason to smile again when Chris popped the question back in November.

"I always knew I would spend the rest of my life with Christopher. But last night while we were walking on the Beach in Mexico he made it official! We're engaged!" she said at the time.

Deena continued to gush over the exciting news with yet another touching Instagram message.

MORE: Deena Cortese Returns to 'Jersey Shore' House — Further Fuels Reunion Rumors!

"This year has been really hard for me and my mom. I honestly haven't felt 100% happy since my dad passed away, until this weekend. Chris couldn't have picked a better time to do all of this especially with the holidays coming up and me and my mom being super sad about not having my dad here," the reality star explained.

"I'm glad we are able to end the year with a happy moment. I know my dad had a front row seat when Chris proposed and I know he's looking down with a smile from ear to ear."

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It's Christmas time in the city 🎄 @cbuckner_

A post shared by Deena (@deenanicolemtv) on

We are so happy about how far she has come.

See how much Deena has changed over the years in the gallery!