If you can gleam anything from "Jar of Hearts" and that Twilight song, it's that Christina Perri has a musical formula that works and she sticks to it. Whether or not that's a good thing is for you to decide.
But the Jam of the Week? That's for me to decide. And this week, it goes to Christina's latest single "Human", a song about, well, being human. She sings about being capable of intense love but of the occasional mistake as well.