If you are referring to the unreleased track "Bad Chick," the story often shared by fans is that it was recorded during a time when Demi was transitioning from her "Disney" image into a more mature, edgy rock-pop sound.
This is a 2013 song by Avril Lavigne that features Demi Lovato. It’s a high-energy track about rebellion and "bad girl" attitudes. Demi Lovato Bad Chick mp3
It features heavy percussion and Demi's signature "power belt," similar to her work on the Holy Fvck album but with a more polished pop production. If you'd like, I can: Help you find the lyrics to "Bad Chick" or "Bad Girl." If you are referring to the unreleased track
Provide a list of other that have leaked online. It features heavy percussion and Demi's signature "power
Like many unreleased demos, it found its way onto the internet via fan forums and YouTube, where it became a cult favorite among "Lovatics" who preferred her rock-heavy vocals.
However, it is likely you are looking for one of the following tracks with similar themes or titles: