Demi Lovato’s “Heart by Heart” Song Snippet from ‘The Mortal Instruments’ Soundtrack

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You know that soundtrack for The Mortal Instruments: City of Bones we were talking about yesterday? Yeah, well there's big news on that front: You can already get a taste of it!

Demi Lovato's "Heart by Heart" ballad will be on the upcoming album for the film, and you can get your first listen. Right. This. Second. The clip's only a minute long, but you can still tell that it was pretty much made for Jace and Clary. Just get a look at some of the lyrics!

When your soul finds the soul it was waiting for
When someone walks into your heart through an open door
When your hand finds the hand it was meant to hold
Don't let go

Someone comes into your world
Suddenly your world has changed forever

No there's no one else's eyes that can see into me
No one else's arms can lift, lift me up so high
Your love lifts me out of time
And you know my heart by heart

The Mortal Instruments: City of Bones hits theaters Wednesday, August 21. Until then, get a load of Demi's "Heart by Heart" above, as well as all the latest pictures in the gallery below.