Avril Lavigne's engagement ring is huge.

Nickelback singer Chad Kroeger proposed to Lavigne on Aug. 7. He presented Lavigne, 27, with a 14-carat diamond ring.

The pair has been dating for six months. They met in February to co-write a song for Lavigne's upcoming fifth studio album, according to reports.

"A romantic relationship blossomed as they spent time writing together," a Lavigne pal told People magazine.

The diamond ring debuted on the cover of this week's issue of Hello! Canada magazine, due out Thursday. It features an exclusive interview with the newly engaged couple.

"We helped Chad custom create Avril's dream ring: a platinum-set pear-shape diamond with half moons totaling 14 carats from XIVKARATS in Beverly Hills," designer Caryn Alpert told People exclusively. "What a perfect pair/pear!"

Who wouldn't be super happy after getting a ring like that?

According to People, the bride-to-be is "glowing," according to a family source. "Just looking at them, you can see how much he adores her."

"He makes her so happy. Both of their families could not be more excited."

In the exclusive interview, Kroeger, 37, reveals, "I am the luckiest person alive," according to Ottawa Citizen.

He also reveals he used a scrapbook to pop the question to Lavigne as the pair worked together on her upcoming fifth studio album in Los Angeles.

"It happened in their recording studio. She was scrapbooking and he added a page to the scrapbook, and the page said: 'Will you marry me?"' Alison Eastwood, editor-in-chief of Hello! Canada, said Wednesday in a telephone interview.

In the five-page photo spread, the power couple reveal they started off as friends on location in Paris and their feelings for each other quickly developed from there.

"I knew I was falling for her. It was incredibly powerful and something I'll never forget," Kroeger, who hails from Hanna, Alta., told the magazine.

Lavigne, who grew up in Napanee, Ont., said, "He makes me laugh every day. He takes care of me in every way and is extremely attentive."

"He's totally besotted with Avril, and who can blame him? But if you see the photographs in the magazine ... he's just beaming from ear to ear. We have never seen Chad Kroeger look so happy," Eastwood said.

Lavigne also gushed to the magazine about Kroeger's sense of humour.

"She said some people might not even know that about him, that he's incredibly funny," said Eastwood.

"As we say, they're making beautiful music together," she added. "We're very happy for them, and when you read the story and see the photographs, it's very touching, perhaps unexpectedly so."

The two haven't announced a wedding date yet, but Lavigne told Hello! "she has the whole thing planned out and that it will be a huge celebration," said Eastwood.

According to Ottawa Citizen, this will be the first marriage for Kroeger and the second for Lavigne, who was married to Canuck Deryck Whibley of Sum 41.