Avril Lavigne and Chad Kroeger to tie the knot

Avril Lavigne and Nickelback frontman Chad Kroeger have been successful in keeping their relationship a secret, and now they've announced some unexpected and happy news - the two are engaged, according to People Magazine.

The couple got together after they co-wrote a song this past February for Lavigne's upcoming album. Since then, they have not confirmed their relationship - until now.

Even though Lavigne, 27, has yet to go out in public with her new engagement ring, it is reportedly a 14-carat diamond sparkler. Kroeger popped the question with this quite significant bauble on August 8, the media outlet reports.

This will be 37-year-old Kroeger's first marriage, and Lavigne's second. She first wed Sum 41 frontman Deryck Whibley in 2006. The two divorced in 2009, E! Online reports.

Those who want to rock diamonds just like Lavigne can do so, but they do not have to break the bank. Purchasing affordable jewelry such as the 11.79 CT TW DiamonUltra Cubic Zirconia Ring in Sterling Silver will give off the same look, but for much less.