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It looks like Avril Lavigne is battling an undisclosed health issue. The singer's fans are taking to Twitter with the hashtag "#GetWellSoonAvril," after reports of some kind of mystery illness started surfacing online. 

Reports about the illness stem from a fan account called @AvrilMusicChart, who claims to have received a Direct Message from the singer herself over the weekend. 

According to USA Today, the Twitter DM reportedly said, "I feel bad because I haven't been able to say anything to the fans to let them (know) why I have been absent. I'm torn as I'm quite private ... I’m not feeling well. I’m having some health issues. So please keep me in your prayers."

So what is this undisclosed, mystery illness? Billboard confirmed with a rep for Avril that she is not pregnant, as some have suggested, and that the private Twitter message is authentic -- but would not divulge any further information than that.

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