Today is the day!
To get her fans extra excited, the 19-year-old teased some of the goodies to Snapchat on Thursday. Take a look (below):
[Image via Instagram.]
Demetria was still a shining star, however, despite matching her bun head and nude makeup to go with her nude mini dress.
Promoting the new season of X Factor (Sept. 12!!), Demi posed with her fellow judge L.A. Reid at the event's red carpet.
We are SO stoked for the premiere and can't wait to see our two little darlings, Demi and Britney, go head-to-head!
Check out more pics of D-D-Demi (below)!
[Image via WENN.]