Demi Lovato 'Heart By Heart': Singer Previews New Song On 'Mortal Instruments' Soundtrack (LISTEN)

07/03/2013 01:31 pm ET

The soundtrack for "The Mortal Instruments" is set to be released on August 20th and will feature music from Jessie J, Colbie Callait, Owl City and Demi Lovato, among others.

In fact, Demi just released a teaser for her brand new "Mortal Instruments" track, titled "Heart to Heart." Listen below.

The song definitely has a darker vibe than the singer's latest single, "Made In The USA." WDYT, Lovatics? Sound off in the comments below or tweet @HuffPostTeen!

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