Britney Spears Shows Off Diamond Engagement Ring from Sam Asghari — See Her New Bling

·3 min read
Britney Spears Shows Off Diamond Engagement Ring from Sam Asghari — See Her New Bling

Britney Spears is engaged — and can't stop flashing her new diamond ring!

The singer, 39, shared the big news on Instagram Sunday, in a video complication modeling the ring in various poses. She captioned the post, "I can't f—ing believe it 💍💍💍💍💍💍❣️!!!!!!"

Britney Spears Instagram
Britney Spears Instagram

Britney Spears Instagram Sam Asghari and Britney Spears

Her fiancé, Sam Asghari, 27, also shared the happy news on his Instagram account, featuring a pic of the couple kissing as Spears flashed the camera with her ring finger and new bling.

RELATED: Britney Spears and Sam Asghari Are Engaged: 'I Can't … Believe It!'

Spears' engagement ring, featuring a 4-carat round-cut diamond with a platinum cathedral setting on a plain silver band, was designed by Forever Diamonds NY's jeweler Roman Malayev. Asghari's manager Brandon Cohen says Malayev "couldn't be happier to be involved and make this one-of-a-kind ring."

Britney Spears
Britney Spears

Courtesy Diamonds Forever

According to a release from the jewelry brand, Asghari spent months searching for a designer before choosing Malayev.

Britney Spears Instagram
Britney Spears Instagram

Britney Spears Instagram

"Every designer I spoke with about the ring was amazing with great ideas, but I just clicked with Roman — we really connected on the design and he was as excited as I was to make it special — that's why I chose him," Asghari said in a statement.

Britney Spears
Britney Spears

Courtesy Diamonds Forever

Malayev enhanced the floating solitaire design with pavé detailing on the bridge and diamonds on the prongs. He also engraved the word "Lioness" on the inside of the band as a nod to Asghari's nickname for Spears.

RELATED GALLERY: Britney Spears and Boyfriend Sam Asghari's Cutest Moments Together, from Couple Workouts to Dance Parties

Britney Spears Instagram
Britney Spears Instagram

Britney Spears Instagram Britney Spears and Sam Asghari

Britney Spears Instagram
Britney Spears Instagram

Britney Spears Instagram Sam Asghari and Britney Spears

Cohen confirmed the engagement in a statement saying, "The couple made their long-standing relationship official today and are deeply touched by the support, dedication and love expressed to them."

For more on Britney Spears and Sam Asghari's engagement news and other top stories, listen below to our daily podcast PEOPLE Every Day.

The singer and actor-fitness enthusiast were first romantically linked after meeting on set of Spears' "Slumber Party" music video in 2016 and have been dating for over four years.

In August, Spears praised her now-fiancé on Instagram for helping her through the "hardest years" of her life.

"Not only has this cute asshole been with me through the hardest years of my life but he happens to be an extremely good cook 👨🏽‍🍳!" Spears wrote, who has fought to end her 13-year conservatorship this year. "Fast & Furious franchise, don't miss out on your next star 🌟🏎️👗🤓 !!!!"

The Iranian-born actor opened up in an interview with Forbes in March about the beginning of his relationship with Spears and admitted he was ready to take the next step in his career — and relationship.

"My priorities in life are to remain humble and understand where I came from and where I'm going," he told Forbes at the time. "I want to take my career to the next step when it comes to acting. I want to take my relationship to the next step, as well. I don't mind becoming a father. I want to be a young dad."

Spears gave a cute shoutout to his "dad" vibes in a series of hiking pics shared on Instagram in July.

"@SamAsghari looks like such a dad in these pics 😂😂😂," she captioned the post.

Following Spear's explosive court hearing in June, a source told PEOPLE that Asghari was the singer's "rock."

"Sam has been Britney's rock for years. He makes sure that she eats well and works out," the source said about Spears' boyfriend. "She leans on him for everything. He works and has his own life too, but is around as much as he can."