What are the songs in twilight called?

When Bella and Edward are dancing at the prom it "Never think"-Rob Pattison.

And when they first enter the prom its "Go all the way (into the twilight)"- Perry Farre "Never Think" is played in the Ballet studio after Bella gets bitten and at the restaurant. The song that is playing when they are dancing at the prom is "Flightless Bird/American Mouth" by Iron & Wine.