Double duty for Demi!

Demi Lovato is a consummate professional, pulling a double shift, so to speak, and working on a holiday. She not only served in her weekly judge's role on 'X Factor,' but she also performed her new single 'Neon Lights' on the show's Thanksgiving ep (Nov. 28).

With her blue hair and studded leather jacket, Lovato showed off her "rock chic" fashion sense and was surrounded by hunky male dancers. She also performed bathed in backlight, so her nail polish and her lipstick glowed.

She looked like an alien -- a hot, talented, amazing alien, to boot.

The singer and 'Glee' star revealed she would be "working a double" when she appeared on Jimmy Kimmel's show.