Whoa, Canada!

Avril Lavigne and Nickelback frontman Chad Kroeger's relationship has been so quiet that few even knew they were dating. Now, after a six-month courtship, the Canadian rockers are engaged to be married, Lavigne's rep tells PEOPLE exclusively.

Lavigne, 27, and Kroeger, 37, first got together in February to co-write a song for Lavigne's upcoming fifth studio album.

"A romantic relationship blossomed as they spent time writing together," a Lavigne pal tells PEOPLE.

On Aug. 8, Kroeger popped the question, presenting Lavigne with a 14-carat diamond sparkler.

"He makes her so happy," a family source tells PEOPLE. "Both of their families could not be more excited."

It will be Kroeger's first trip down the aisle, and the second marriage for Lavigne, who split from Sum 41 frontman Deryck Whibley in 2009. She had also dated Brody Jenner.

沪江娱乐快讯：超人气女歌手艾薇儿·拉维尼与交往六个月的男友查德克·罗格订婚了！查德克·罗格是加拿大五分钱乐队的主唱，也是艾薇儿新专辑的制作人，两人是在创作新专辑中产生了爱情的火花，相处半年后终成正果。

今年8月8日，这位37岁男歌手向艾薇儿求婚，求婚钻戒就有14克拉。在此之后，艾薇儿家人表示：“他让艾薇儿很幸福，我们双方家庭都不能再兴奋了。”

这是查德克的首次婚姻，对艾薇儿而言，在2009年与Sum41主唱离婚后，将第二次步入婚姻殿堂。

五分钱乐队简介：

五分钱乐队(Nickelback)，是成立于亚伯达哈纳的加拿大摇滚乐团，由柴德·克罗格、麦克·克罗格、莱恩·皮克与前鼓手布兰登·克罗格组成。五分钱合唱团是商业上最成功的加拿大团体之一，在全球拥有三千万唱片销售量。五分钱合唱团在21世纪最畅销音乐中排名第十一名，也在美国的21世纪最畅销外国音乐排名第二名，仅次披头士。