Meet Mr. and Mrs. Nickelback -- Chad Kroeger and Avril Lavigne are officially married!

The rocker pair reportedly said "I do" in the South of France on Monday, which coincided with Canada Day. Sources tell Us Weekly that the couple exchanged vows in front of 50 of their closest friends and family at Chateau La Napoule in Mandelieu, France.

After the ceremony, the reception lasted until the early hours of Tuesday morning. "Yes, they're married," one source tells the mag. Adding, "It was a wild, all-night party with drinking, dancing, incredible food and lots of laughter and tears of happiness."

There was also a firework show over the Mediterranean and "Avril and Chad had glasses of wine in their hands and were kissing as fireworks popped overhead and sparkled down," the insider reveals.

And the reception included one epic dance party -- songs ranged from classics like "Sweet Home Alabama" to Bruno Mars' hit "Marry You."

Avril was formerly married to Sum 41 frontman Deryck Whibley in October 2009, but split after three years of marriage. Kroeger has never been married.

Congrats to the happy couple!

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