Demi Lovato Gives Nude Pic Creepo the Brush Off

10/18/2015 7:33 AM PDT

Demi Lovato Gives Nude Pic Creepo the Brush Off

Demi Lovato was amused by a creepy guy who wanted her to sign a pic of her ... sans clothes.

Demi was leaving the SNL afterparty when the guy presented the naked pic and a pen.  She smiled and brushed him off. 

Butt out.