The MTV VMAs just announced another star in their lineup – Demi Lovato!

She's going to perform her song “Give Your Heart a Break” during the pre-show special, which airs an hour before the awards show.

There are tons of great performances to look forward to during the main show as well. One Direction, Taylor Swift, and Rihanna are all doing performances, and other celebs like Miley Cyrus and the Wanted will be making appearances too.

Justin Bieber tweeted his interest in joining the show, saying “I would perform. Always ready. #VMAs #VoteBieber.”

The VMAs air on MTV on September 6^th at 8 p.m. Eastern. You can vote HERE for your favorite nominees!

Sources: Just Jared, Bop & Tiger Beat