Look at that tiny waist!
Demi Lovato is a veteran X Factor dresser at this point and it shows!
The singer looked VAMPALICIOUS at the Long Island auditions for the show on Thursday, dressed in a Hellessy keyhole top and Theory pedal pushers cinched together with a ribbed leather belt.
She added just a touch of color with red & black Saint Laurent pumps and a bold red lip.
And doesn't she look AMAZE with those Marilyn Monroe-style waves???
[Image courtesy of Fox]
Tags: demi lovato, hellesy, theory, x factor, x factor auditions, yves saint laurent