Can't Get These Songs Out of My Head

These songs have been in my head for a long time.  Fortunately they're all songs that I love, so I don't mind so much.

1)  My favorite song from Grease - "You're the One That I Want"

2)  Rufus Wainwright's version of "Hallelujah"

3)  "Lucky Ones" by Lana Del Rey