My jaw was actually agape when Casey started dueting with herself on Worthy. You know if Jeff wrote this song he would have had two vocalists, but this really shows her insane range. It actually took me a second to realize it wasn't two people.
Chatterbox is interesting too. Maybe it's just me but she really sounds like Myles Kennedy here. I heard it in a song her band did for volume 8 as well. As an Alter Bridge fan I'm actually loving these vibes!
Anyway, the rest of the soundtrack is great too but my one complaint is that the vocals aren't clear enough on a lot of the tracks. Seems like it was done on purpose, and I don't understand why they'd want to muffle Casey's amazing voice.