Based on the FF8 image and it being a supposed karaoke game, you would think they are trying to say Eyes On Me is in there. But that track seems to have all sorts of copyright issues, and is possibly the reason for its exclusion in Theatrhythm. That's one of the other big giveaways, for me.
And yet, APZ is right - this could easily be made one day, given the number of vocal tunes in the series now. It's just all those aforementioned copyrights that would be an issue.