Congratulations to Avril Lavigne and Nickelback front man Chad Kroeger who have announced their engagement!

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The Canadian musicians have been secretly dating for six months, after working together on a song for Avril's upcoming album.

A close friend told People magazine that "a romantic relationship blossomed as they spent time writing together."

The Nickelback singer allegedly presented the 'Sk8er Boi' singer with a 14-carat diamond ring when he proposed.

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Taking to twitter, both the Nickelback crew and Avril herself have retweeted congratulatory messages from friends and fans.

This will be Avril's second marriage; she divorced Sum 41 musician Deryck Whibley back in 2009. Although Chad has never been married before, he had shared six years with his last girlfriend Marianne Goriuk.

Their engagements comes as quite a shock because it was only earlier this year that she was still dating Kim Kardashian's stepbrother, Brody Jenner earlier this year. They had been together for two years and she even had his name tattooed on her body.

There are no details as of yet about the upcoming wedding, but we expect a rock'n'roll wedding to remember.

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