In the photos she sported thick make-up, including lashings of copper eye-shadow and black mascara, rosy blush and a glossy pink lip.
Demi finished off her look with white sneakers, a chunky red bangle and matching hoop earrings.
Her appearance comes just days after she was spotted filming scenes for a new music video in Los Angeles.
2008 film Camp Rock in which she performed her role as Mitchie Torres.
Camp Rock was Disney Channel Original Movie (DCOM).
As a solo musical artist, Lovato released her first album, Don't Forget, on September 23, 2008.
The album started at number two on the Billboard 200. It has since shipped over 500,000 copies in the United States.
The Skyscraper singer, 24, looked fierce as she headed to the gig, strutting her stuff in a low-cut, long-sleeve navy shirt and tight black jeans.