Ashton's Self-Proclaimed Mistress -- Gimme Moore

10/21/2010 9:15 AM PDT
Ashton Kutcher's alleged mistress Brittney Jones has a lot in common with Demi Moore ... like a bikini, a cell phone, a mirror, and a killer body.

TMZ obtained this picture of 21-year-old Brittney -- whom Ashton vehemently denies ever hooking up with -- as she shows off the goods Demi-style in a self-snapped photo.

Can you stomach that?