9:23 AM PT -- 4/7 -- Avril and Mod confirmed the news on social media. Mod popped the question in front of the Eiffel Tower at the end of March.
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Avril Lavigne and her boyfriend Mod Sun may have officially taken things to the next level ... 'cause she's wearing what appears to be an engagement ring!!
The "Girlfriend" singer was spotted, Tuesday, arriving at a studio in Los, Angeles rockin' a MASSIVE diamond ring on THAT finger. Interestingly enough, she wasn't wearing the ring when she hit the Grammy's red carpet over the weekend ... so if the engagement did happen it was either very recent, or she just didn't want it known at the award show.