Demi Lovato Performing at the 2012 MTV Video Music Awards Pre-Show

Demi Lovato is set to rile up the crowd at the 2012 MTV Video Music Awards!

The "Give Your Heart a Break" singer and X Factor judge will perform live during the VMA pre-show on September 6 starting at 7 p.m. (ET/PT). The 20-year-old singer will be warming-up the crowd along with DJ and hit producer Calvin Harris.

"I'm so excited to perform at the VMA preshow. I can't believe it!" posted Demi on Twitter. The main-show will include performances by One Direction, Rihanna, Taylor Swift, Pink, and more.

Demi may also snag a moon man at the live event! She's nominated for "Best Video With a Message" for her hit single, "Skyscraper." The Latina pop star is up against Kelly Clarkson, Gym Class Heroes, Rise Against, K'Naan feat. Nelly Furtado, and Lil' Wayne.

Are you voting for Demi to win? Cast your vote at