Demi Lovato is a natural beauty. The 'X Factor' judge / 'Heart Attack' singer took to Twitter to post a makeup-free photo and encouraged her beloved Lovatics to do the same in a concerted effort to boost their self-esteem -- and based on the reactions she garnered, it worked!

Her fans soon started following suit, tweeting naked face photos to the former Disney starlet. Lovato responded to them kindly, and the amounts of favorites and retweets on each post likely boosted the egos of these gals for a while.

Proof that Demz not only cleans up nicely, but she cleans off nicely too. What a class act!

Watch the Demi Lovato 'Heart Attack' Lyric Video