The "Sk8er Boi" crooner has had quite the year, calling it quits with longtime boyfriend Brody Jenner in February, and getting engaged to Nickelback frontman Chad Kroeger months later in August.
And we're sure there are even bigger monuments on the horizon for this Canadian singer who recently showed off her Abbey Dawn clothing line during Mercedes-Benz Fashion Week.
While its clear Lavigne won't be celebrating this birthday with baby news, we can't help but to wonder what birthday surprises her hubby-to-be has in store (considering the whopping 14-carat diamond he put on her ring finger).
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