Chad Kroeger proposed to Avril Lavigne by adding a page to her scrapbook.

The Nickleback singer and the 'Sk8r Boi' hitmaker became engaged after a whirlwind romance this year, and he asked his fellow Canadian to marry him by writing it down.

Alison Eastwood, editor-in-chief of HELLO! Canada, said: "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?' "

The pair's romance began when he started working with her on her new album in February, and he has revealed he is the "luckiest person alive" to be with Avril -- who has previously romanced Brody Jenner and Sum 41 singer Deryck Whibley.

Kroeger said: "I knew I was falling for her. It was incredibly powerful and something I'll never forget ... I feel like the luckiest person alive because I get to be with my best friend every day!"

Lavigne added her new love makes her laugh constantly and is impressed by how much he meets her needs.

She said: "He makes me laugh every day. He takes care of me in every way and is extremely attentive."