When you're Big Sean, you keep your fiancé Naya Rivera happily engaged by gifting an equally stunning sparkler comparable to the 4-carat diamond engagement ring. This is exactly what the rapper did as the "Glee" star  posted an Instagram photo of an expensive diamond necklace gifted to match her ring.

"Merry Christmas. photo and gift credit @bigsean," Rivera wrote as a caption.

Lucky girl!

In an earlier report by E! News, celebrity jewelry expert, Michael O'Connor, said Naya's ring seems to be a princess cut diamond with a halo setting, which seems to be getting popular in recent years.

Among celebrities, Natalie Portman was one of the firsts to wear a similar design.

"It's classic with a modern twist! We're seeing more and more square cuts these days. It's getting a lot more play now, whereas round cuts used to be the most popular a few years ago," he said.

The "Glee" star and her rapper beau have confirmed that they are engaged during the red carpet of the "Hollywood Hot List" at the Redbury in October this year. The confirmation came six months after they started dating.

"He's my best friend," Naya told reporters at the event.

Also in October, Naya has been spotted looking for a wedding dress along with BFF and Glee co-star Kevin McHale. They visited renowned (and expensive!) wedding gown designer Monique Lhuillier in Beverly Hills, California.

According to US Weekly, both Naya and Kevin were joined by her mother, girlfriends and younger sister.

Two months later and still Naya couldn't find the perfect dress. However, she said she's been having fun because as she described the hunt as "going really well."

"It's obviously something that I've never done before, but it's so fun. It's that Cinderella, Princess moment, and I went around with my friends, my mom, and it just felt amazing to try on all of those gowns," Naya said as reported in Yahoo! News.