Board Thread:Spoilers!/@comment-2153169-20170122203703/@comment-1916997-20170123201638

If the musical episode is indeed Awake, they I assume the singing is in the dream world of Snow and Charming's sleeping curse. The end of the episode would be them breaking the curse somehow. And Tiger Lily is probably just introduced in this episode, and has a bigger role in 618 (which I'm guessing makes that the Hook centric then).